Canadian respiratory virus surveillance reports - 2026

In week 11 (week ending March 21, 2026) In Canada, indicators of activity were decreasing for COVID-19 and RSV, and were either stable or decreasing for influenza. Please note: The next full update to this report will be on Tuesday April 7, 2026, with data up to and including March 28, 2026 (surveillance week 12).

• Laboratory-confirmed detections
• The percentage of tests positive for influenza remained stable at 5.7% in week 11. Influenza B activity continued to gradually increase while influenza A gradually decreased; influenza B detections have surpassed influenza A detections as the two viruses co-circulate at low levels. However, trends vary by region.
• The percentage of tests positive for RSV and the percentage of tests positive for COVID-19 decreased in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for human coronaviruses (HCoV). Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever was stable at 1.5% in week 11.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks were associated with COVID-19 (61%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been stable in recent weeks. The majority of hospitalizations are associated with RSV.

In week 10 (week ending March 14, 2026) In Canada, indicators of activity were either stable or decreasing for influenza, COVID-19, and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza remained stable at 5.6% in week 10. Influenza B activity continued to gradually increase while influenza A gradually decreased; influenza B detections have surpassed influenza A detections as the two viruses co-circulate at low levels. However, trends vary by region.
• The percentage of tests positive for RSV decreased and the percentage of tests positive for COVID-19 was stable in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for human coronaviruses (HCoV). HCoV percent positivity decreased in the most recent reporting week.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever decreased slightly to 1.5% in week 10 (1.6% in week 9).
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks were associated with COVID-19 (53%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been stable in recent weeks. The majority of hospitalizations are associated with RSV.

In week 9 (week ending March 7, 2026) In Canada, indicators of activity were either stable or decreasing for influenza and RSV. All indicators of COVID-19 activity were decreasing.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza remained stable at 5.5% in week 9. Influenza B activity continued to gradually increase while influenza A gradually decreased; influenza B detections have surpassed influenza A detections as the two viruses co-circulate at low levels. However, trends vary by region.
• The percentage of tests positive for COVID-19 and the percentage of tests positive for RSV decreased in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for human coronaviruses (HCoV). HCoV percent positivity was stable in the most recent reporting week.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever increased slightly to 1.6% in week 8 (1.4% in week 7).
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks were associated with COVID-19 (55%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have decreased in recent weeks. The majority of hospitalizations are associated with RSV.

In week 8 (week ending February 28, 2026) in Canada, indicators of activity were either stable or decreasing for influenza, COVID-19, and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza was stable at 5.5% in week 8. Influenza A and B are now co-dominating with influenza A activity gradually decreasing while influenza B gradually increases. However, trends vary by region. Among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 decreased and the percentage of tests positive for RSV was stable in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for human coronaviruses (HCoV). HCoV percent positivity increased slightly in the most recent reporting week, reaching its highest level since the 2021-2022 season.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever decreased to 1.3% in week 8.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks were associated with COVID-19 (66%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories was stable.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have decreased in recent weeks. The majority of hospitalizations are associated with RSV.

In week 7 (week ending February 21, 2026) In Canada, indicators of influenza activity were decreasing, while indicators of COVID-19 activity and RSV activity were stable.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza decreased to 5.5% in week 7. Influenza A detections remain predominant, but are decreasing. Influenza B detections were stable in week 7, following a period of increase; however, trends vary by region. Among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 and the percentage of tests positive for RSV were stable in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for human coronaviruses (HCoV), which has reached its highest level since the 2021-2022 season.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever was stable at 1.5% in week 7.
• Outbreaks
• The number of weekly respiratory viral outbreaks was stable.
• The majority of outbreaks were associated with COVID-19 (59%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories was stable.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been stable in recent weeks. The majority of hospitalizations are associated with RSV.

In week 6 (week ending February 14, 2026) In Canada, indicators of activity were generally stable for each of influenza, COVID-19, and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza was stable at 6.1% in week 6. Influenza A detections remain predominant, but are decreasing while detections of influenza B increase; trends vary by region. Among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 and the percentage of tests positive for RSV were stable in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for human coronaviruses (HCoV). Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever increased to 1.5% in week 6 (1.2% in week 5).
• Outbreaks
• The number of weekly respiratory viral outbreaks continues to decrease.
• The majority of outbreaks were associated with COVID-19 (61%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories has stabilized.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been stable in recent weeks. The majority of hospitalizations are associated with RSV.
   

In week 5 (week ending February 7, 2026). In Canada, all indicators of influenza activity continued to decrease. Indicators of RSV activity were stable and indicators of COVID-19 activity were decreasing or stable. Between November and January of the 2025/26 season, the Canadian Sentinel Practitioner Surveillance Network estimates that the risk of medically-attended influenza A(H3N2) illness was reduced by 40% among vaccinated relative to unvaccinated individuals.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continued to decrease, reaching 6.4% in week 5, from 7.6% in week 4. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 and the percentage of tests positive for RSV were stable in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever was stable at 1.3%.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks were associated with COVID-19 (58%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been stable in recent weeks. The majority of hospitalizations are associated with RSV.

In week 4 (week ending January 31, 2026) In Canada, all indicators of influenza activity continued to decrease. Indicators of RSV activity were either increasing or stable and indicators of COVID-19 activity were decreasing or stable. Between November and January of the 2025/26 season, the Canadian Sentinel Practitioner Surveillance Network estimates that the risk of medically-attended influenza A(H3N2) illness was reduced by 40% among vaccinated relative to unvaccinated individuals.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continued to decrease, reaching 7.5% in week 4, from 8.2% in week 3. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 was stable, while the percentage of tests positive for RSV increased in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever slightly increased to 1.3%.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks was associated with COVID-19 (60%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been decreasing in recent weeks.

In week 3 (week ending January 24, 2026) In Canada, all indicators of influenza activity continued to decrease. Indicators of RSV activity were either increasing or stable and indicators of COVID-19 activity were stable or decreasing.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continued to decrease, reaching 8.2% in week 3, from 12.2% in week 2 (week ending January 17, 2026). Detections decreased in all age groups. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 was stable, while the percentage positive for RSV increased in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever continues to decrease, reaching 1.1%.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks was associated with COVID-19 (57%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been decreasing in recent weeks.

In week 2 (week ending January 17, 2026) In Canada, all indicators of influenza activity decreased sharply. Indicators of RSV activity were either increasing or stable and indicators of COVID-19 activity were stable or decreasing.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continued to decrease sharply, reaching 12.0% in week 2, down from 18.1% in week 1 (week ending January 10, 2026). Detections decreased in all age groups. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 was stable, while the percentage positive for RSV increased in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever continues to decrease sharply, reaching 1.3%.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased sharply.
• The highest percentage of outbreaks was associated with COVID-19 (49%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased sharply.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been decreasing in recent weeks.

In week 1 (week ending January 10, 2026) In Canada, all indicators of influenza activity decreased sharply. Indicators of RSV activity were either stable or increasing slowly and indicators of COVID-19 activity were stable.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continued to decrease sharply, reaching 18.1% in week 1, down from the peak of 33.9% in week 52 (week ending December 27, 2025). Detections decreased in all age groups. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for both COVID-19 and RSV was stable in the most recent reporting week.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever continues to decrease sharply, reaching 1.9%.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased sharply.
• The majority of outbreaks were associated with influenza (54%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories decreased sharply.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been decreasing in recent weeks.

Canadian respiratory virus surveillance reports - 2025

In week 52 (week ending December 27, 2025), In Canada, influenza percent positivity reached 33.3%, the highest value recorded in the past three seasons. Detections in individuals ≤19 years have decreased in recent weeks. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 increased in the most recent reporting week. The percentage of tests positive for RSV is increasing slowly but is below expected levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever reached 4.8%, the highest value recorded in the past 3 seasons. 
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• The majority of outbreaks were associated with influenza (72%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories has stabilized but decreased in the most recent week.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been decreasing in recent weeks.

In week 51 (week ending December 20, 2025)

• The percentage of tests positive for influenza increased to 32.4% (from 28% in week 50). The weekly increase was smaller compared to previous weeks. In the our syndromic surveillance indicator, FluWatchers, the percentage of participants reporting cough and fever increased to 4.8% (from 4.1% in week 50). This also reflected a smaller increase compared to previous weeks.
• The percentage of tests positive for COVID-19 was stable.
• The percentage of tests positive for RSV was stable.

In week 50 (week ending December 13, 2025) In Canada, indicators of influenza activity were high and increasing. Indicators of RSV activity were low but increasing slowly. Indicators of COVID-19 activity were stable.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continues to increase quickly and is similar to the highest value recorded in the past three seasons (27.6% the week ending February 15, 2025). Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 was stable in the most recent reporting week. The percentage of tests positive for RSV is increasing slowly but is below expected levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever continues to increase sharply and is higher than any week of the past three seasons.
• Outbreaks
• The number of weekly respiratory viral outbreaks is increasing.
• The majority of outbreaks were associated with influenza (65%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is increasing.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been increasing in recent weeks, primarily due to increasing hospitalizations associated with influenza

In week 49 (week ending December 6, 2025) In Canada, indicators of influenza activity are increasing rapidly. Indicators of COVID-19 activity are stable and indicators of RSV activity are showing signs of increase.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza is increasing quickly. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 was stable in the most recent reporting week. The percentage of tests positive for RSV is showing signs of increase but is below expected levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever increased sharply over the last two reporting weeks.
• Outbreaks
• The number of weekly respiratory viral outbreaks is increasing.
• The majority of outbreaks were associated with influenza (49%).
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is increasing.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been increasing in recent weeks due to increasing hospitalizations associated with influenza and RSV.

In week 48 (week ending November 29, 2025 In Canada, indicators of influenza activity continue to increase. Indicators of COVID-19 activity were inconsistent but overall stable. Indicators of RSV activity are stable at inter-seasonal levels but showing signs of increase.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continues to increase. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 was stable in the most recent reporting week. The percentage of tests positive for RSV remained stable at interseasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever increased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks was stable.
• The majority of outbreaks were associated with COVID-19 (66%). However, the proportion of outbreaks associated with influenza has increased in recent weeks.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is increasing.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been increasing in recent weeks due to increasing hospitalizations associated with influenza and RSV.

In week 47 (week ending November 22, 2025) In Canada, indicators of influenza activity are increasing. The influenza season has started in Canada as of week 46 (week ending November 15, 2025). Indicators of COVID-19 activity are stable. Indicators of RSV activity remained stable at inter-seasonal levels.

• Laboratory-confirmed detections
• The percentage of tests positive for influenza continues to increase. Laboratory detections are predominantly influenza A and among subtyped influenza A detections, influenza A(H3N2) is predominant.
• The percentage of tests positive for COVID-19 was stable in the most recent reporting week. The percentage of tests positive for RSV remained stable at inter-seasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever remained stable in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks increased.
• The majority of outbreaks were associated with COVID-19 (68%). However, the proportion of outbreaks associated with influenza has increased in recent weeks.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is increasing.
• Pediatric respiratory viral hospitalizations reported by SPRINT-KIDS have been increasing in recent weeks, primarily due to increasing hospitalizations associated with influenza.

In week 46 (week ending November 15, 2025) In Canada, indicators of influenza activity are increasing and the percentage of tests positive for influenza has crossed the seasonal threshold. Indicators of COVID-19 activity decreased and indicators of RSV activity remained stable at inter-seasonal levels.

• Laboratory-confirmed detections
• At the national level, the percentage of tests positive for influenza is increasing and has crossed the seasonal threshold of 5%. The 2025-2026 Canadian influenza season has begun in week 46, pending confirmation that percent positivity remains above threshold next week.
• The percentage of tests positive for COVID-19 decreased in the most recent reporting week. The percentage of tests positive for RSV remained stable at interseasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever remained stable in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks was stable.
• The majority of outbreaks were associated with COVID-19 (80%). However, the proportion of outbreaks associated with influenza has increased in recent weeks.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories remains stable.
• 13 pediatric respiratory viral hospitalizations were reported by SPRINT-KIDS in week 46.

In week 45 (week ending November 8, 2025) In Canada, indicators of COVID-19 activity decreased or remained stable. Indicators of influenza activity are increasing and approaching seasonal levels. Indicators of RSV activity remain at interseasonal levels.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 remained stable in the most recent reporting week. The percentage of tests positive for influenza and RSV remained at interseasonal levels, although the percentage of tests positive for influenza is increasing.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus but is decreasing. Percent positivity of other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever remained stable in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• Almost all outbreaks (95%) reported since August 24, 2025 have been associated with COVID-19. However, the proportion of outbreaks associated with influenza has increased in recent weeks.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories remains stable.
• 14 pediatric respiratory viral hospitalizations were reported by SPRINT-KIDS in week 45.
• Laboratory-confirmed detections
• In week 45 (week ending November 08, 2025), among COVID-19, influenza and RSV, percent positivity is currently highest for COVID-19 (7.1% positive; 1,778 detections)

In week 44 (week ending November 1, 2025) In Canada, indicators of COVID-19 activity decreased or remained stable, while indicators of respiratory activity remained at interseasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 remained stable in the most recent reporting week. The percentage of tests positive for influenza and RSV remained at interseasonal levels, although the percentage of tests positive for influenza has increased in recent weeks.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever decreased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• Almost all outbreaks (97%) reported since August 24, 2025 have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories remains stable.
• Five pediatric respiratory viral hospitalizations were reported by SPRINT-KIDS in week 44.

In week 43 (week ending October 25, 2025) In Canada, indicators of COVID-19 activity decreased or remained stable, while indicators of respiratory activity remained at interseasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 remained stable in the most recent reporting week. The percentage of tests positive for influenza and RSV remained at interseasonal levels, although the percentage of tests positive for influenza is increasing.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever increased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• Almost all outbreaks (97%) reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is stabilizing.
• Four pediatric respiratory viral hospitalizations were reported by SPRINT-KIDS in week 43.

In week 42 (week ending October 18, 2025) In Canada, indicators of COVID-19 activity decreased or remained stable, while indicators of respiratory activity remained at interseasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 decreased in the most recent reporting week. The percentage of tests positive for influenza and RSV remained at interseasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever remained stable in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks decreased.
• Almost all outbreaks (97%) reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is stabilizing.
• Six pediatric respiratory viral hospitalizations were reported by SPRINT-KIDS in week 42.

In week 41 (week ending October 11, 2025) In Canada, indicators of COVID-19 activity decreased or remained stable, while indicators of respiratory activity remained at inter-seasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 decreased in the most recent reporting week. The percentage of tests positive for influenza and RSV remained at inter-seasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever decreased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks is stabilizing.
• Almost all outbreaks (99%) reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is stabilizing.
• Four pediatric respiratory viral hospitalizations were reported by SPRINT-KIDS in week 41.

In week 40 (week ending October 4, 2025) In Canada indicators of COVID-19 activity varied across indicators while indicators of respiratory activity remain at interseasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 is decreased in the most recent reporting week. The percentage of tests positive for influenza and RSV remain at interseasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever decreased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks is stabilizing following the decreasing trend in number of outbreaks associated with COVID-19.
• Almost all outbreaks (99%) reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is increasing due to the increasing number of hospitalizations associated with COVID-19.
• Five pediatric respiratory viral hospitalizations were reported by SPRINT-KIDS in week 40.

In week 39 (week ending September 27, 2025) In Canada indicators of COVID-19 activity were increasing while indicators of respiratory activity remain at interseasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 is increasing. The percentage of tests positive for influenza and RSV remain at interseasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever continued to increase in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks is increasing due to the increasing number of outbreaks associated with COVID-19.
• Almost all outbreaks (97%) reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is increasing due to the increasing number of hospitalizations associated with COVID-19.
• Two pediatric hospitalizations were reported by the SPRINT-KIDS sentinel hospital network in week 39.

In week 38 (week ending September 20, 2025) In Canada indicators of COVID-19 activity were increasing while indicators of respiratory activity remain at inter-seasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 is increasing. The percentage of tests positive for influenza and RSV remain at inter-seasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever increased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks increased this week due to the increasing number of outbreaks associated with COVID-19.
• Almost all outbreaks (98%) reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories remains low but is increasing due to increasing hospitalizations related to COVID-19.
• Three pediatric hospitalizations were reported by the SPRINT-KIDS sentinel hospital network in the most recent reporting week.

In week 37 (week ending September 13, 2025) In Canada indicators of COVID-19 activity were increasing or stable while indicators of respiratory activity remain at interseasonal levels for influenza and RSV.

• Laboratory-confirmed detections
• The percentage of tests positive for COVID-19 is increasing. The percentage of tests positive for influenza and RSV remain at interseasonal levels.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever increased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks remained stable this week.
• Almost all outbreaks (99%) reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories remains low but is showing signs of increase due to increasing hospitalizations related to COVID-19.
• Five pediatric hospitalizations were reported by the SPRINT-KIDS sentinel hospital network in the most recent reporting week

In week 36 (week ending September 6, 2025) In Canada indicators of respiratory activity remain at inter-seasonal levels for influenza and RSV. COVID-19 activity is increasing.

• Laboratory-confirmed detections
• The percentage of tests positive remains at inter-seasonal levels for influenza and RSV. COVID-19 percent positivity is increasing.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever is low but increased in the most recent reporting week.
• Outbreaks
• The number of weekly respiratory viral outbreaks increased this week.
• All outbreaks reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories remains low but is showing signs of increase due to increasing hospitalizations related to COVID-19.
• Five pediatric hospitalizations were reported by the SPRINT-KIDS sentinel hospital network in the most recent reporting week.

In weeks 34-35 (ending August 23, 2025) in Canada indicators of respiratory activity remain at or near the lowest levels recorded this season for influenza and RSV. Some indicators of COVID-19 activity are increasing.

• Laboratory-confirmed detections
• The percentage of tests positive is near the lowest levels reported this season for influenza and RSV. COVID-19 percent positivity is increasing; however, trends vary geographically.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever is at the lowest levels reported this season.
• Outbreaks
• The number of weekly respiratory viral outbreaks is near the lowest levels reported this season.
• Nearly all outbreaks reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories near the lowest levels reported this season but is showing signs of gradual increase.
• The number of pediatric hospitalizations reported by the SPRINT-KIDS sentinel hospital network is at the lowest levels reported this season.

In weeks 32-33 (ending August 9, 2025) in Canada indicators of respiratory activity remain at or near the lowest levels recorded this season for all three viruses; however, COVID-19 is showing signs of a gradual increase.

• Laboratory-confirmed detections
• The percentage of tests positive is near the lowest levels reported this season for influenza and RSV. COVID-19 percent positivity is showing signs of a gradual increase; however, trends vary geographically.
• Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of most other respiratory viruses is following historically observed trends.
• Syndromic
• The percentage of volunteer FluWatchers reporting cough and fever is at the lowest levels reported this season.
• Outbreaks
• The number of weekly respiratory viral outbreaks is near the lowest levels reported this season.
• All outbreaks reported in recent weeks have been associated with COVID-19.
• Severe outcomes
• The rate of respiratory viral hospitalizations reported by participating provinces and territories is at the lowest levels reported this season.
• The number of pediatric hospitalizations reported by the SPRINT-KIDS sentinel hospital network is at the lowest levels reported this season.

In weeks 29-30 (ending July 28, 2025) In Canada indicators of respiratory activity are consistently at or near the lowest levels recorded this season for each of COVID-19, influenza, and respiratory syncytial virus (RSV).

• Laboratory-confirmed detections The percentage of tests positive is near the lowest levels reported this season for each of influenza, RSV, and COVID-19. Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of all other respiratory viruses is following historically observed trends.

In weeks 27-28 (ending July 14, 2025) In Canada indicators of respiratory activity are consistently at or near the lowest levels recorded this season for each of COVID-19, influenza, and respiratory syncytial virus (RSV).

• Laboratory-confirmed detections The percentage of tests positive is near the lowest levels reported this season for each of influenza, RSV, and COVID-19. Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of all other respiratory viruses is following historically observed trends.

In weeks 25-26 (ending June 28, 2025) In Canada, indicators of respiratory activity are consistently at or near the lowest levels recorded this season for each of COVID-19, influenza, and respiratory syncytial virus (RSV).

• Laboratory-confirmed detections The percentage of tests positive is near the lowest levels reported this season for each of influenza, RSV, and COVID-19. Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of all other respiratory viruses is following historically observed trends.

In weeks 23-24 (ending June 14, 2025) In Canada, indicators of respiratory activity are consistently at or near the lowest levels recorded this season for each of COVID-19, influenza, and respiratory syncytial virus (RSV).

• Laboratory-confirmed detections The percentage of tests positive is near the lowest levels reported this season for each of influenza, RSV, and COVID-19. Among other respiratory viruses, percent positivity is currently highest for enterovirus/rhinovirus. Percent positivity of all other respiratory viruses is following historically observed trends.

In week 22 (week ending May 31, 2025) In Canada, COVID-19 activity continues to remain stable while influenza and RSV are at inter-seasonal levels.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, all indicators of COVID-19 activity are stable.
• RSV: Nationally, all indicators of respiratory syncytial virus (RSV) activity are low and stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In week 21 (week ending May 24, 2025) In Canada, influenza percent positivity continued to decrease. The end of the influenza season at the national level occurred in week 19 (week ending May 10, 2025). Percent positivity of COVID-19 and RSV continue to remain at low levels.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, most indicators of COVID-19 activity are low and stable.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are low and stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.
• Syndromic activity: The percentage of volunteer FluWatchers reporting cough and fever increased slightly in week 21 and is at low levels.

In week 20 (week ending May 17, 2025) In Canada, influenza percent positivity continued to decrease and is now below the seasonal threshold of 5% for the second consecutive week. The end of the influenza season at the national level occurred in week 19 (week ending May 10, 2025). Percent positivity of COVID-19 and RSV continue to remain at low levels.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, most indicators of COVID-19 activity are low and stable.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are low and stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.
• Syndromic activity: The percentage of volunteer FluWatchers reporting cough and fever decreased slightly in week 20 and is at low levels.

In week 19 (week ending May 10, 2025) In Canada, influenza percent positivity continued to decrease and is now below the seasonal threshold of 5%. If percent positivity remains below this threshold next week, the end of the influenza season will be declared. Percent positivity of COVID-19 and RSV continue to remain at low levels, while enterovirus/rhinovirus currently shows the highest percent positivity among the respiratory viruses under surveillance.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, most indicators of COVID-19 activity are at low levels.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are low and stable.
• The percent positivity of all other respiratory viruses is following historically observed trends. Enterovirus/rhinovirus percent positivity was stable in the most recent surveillance week.

In week 18 (week ending May 3, 2025) In Canada, among respiratory viruses under surveillance, percent positivity is currently highest for influenza and enterovirus/rhinovirus. Indicators of influenza activity continue to decrease in week 18.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, most indicators of COVID-19 activity are at low levels. The percentage of tests positive for COVID-19 is showing early signs of increase but remains low.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are stable.
• The percent positivity of all other respiratory viruses is following historically observed trends. Enterovirus/rhinovirus percent positivity remains stable in the most recent surveillance week.

In week 17 (week ending April 26, 2025) In Canada, among respiratory viruses under surveillance, percent positivity is currently highest for influenza and enterovirus/rhinovirus. Indicators of influenza activity continue to decrease in week 17.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, most indicators of COVID-19 activity are stable at low levels. The percentage of tests positive for COVID-19 is stable at the lowest values ever recorded nationally.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are stable.
• The percent positivity of all other respiratory viruses is following historically observed trends. Enterovirus/rhinovirus percent positivity remains stable in the most recent surveillance week

In week 16 (week ending April 19, 2025) In Canada, among respiratory viruses under surveillance, percent positivity is currently highest for influenza and enterovirus/rhinovirus. Indicators of influenza activity continue to decrease in week 16.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, most indicators of COVID-19 activity are stable at low levels. The percentage of tests positive for COVID-19 is stable at the lowest values ever recorded nationally.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are stable.
• The percent positivity of all other respiratory viruses is following historically observed trends. Enterovirus/rhinovirus percent positivity remains stable in the most recent surveillance week.

In week 15 (week ending April 12, 2025) In Canada, among respiratory viruses under surveillance, percent positivity is currently highest for influenza and enterovirus/rhinovirus. However, indicators of influenza activity continue to decrease in week 15.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week.
• COVID-19: Nationally, most indicators of COVID-19 activity showed signs of stabilization at low levels. The percentage of tests positive for COVID-19 is stable at the lowest values ever recorded nationally.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are stable.
• The percent positivity of all other respiratory viruses is following historically observed trends. Enterovirus/rhinovirus percent positivity is increasing, which is expected at this time of year.

In week 14 (week ending April 5, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, indicators of influenza activity continued to decrease in week 14.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week. The percentage of tests positive for influenza continued to decrease.
• COVID-19: Nationally, most indicators of COVID-19 activity showed signs of stabilization at low levels. The percentage of tests positive for COVID-19 is stable at the lowest values ever recorded nationally.
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are stable. The percentage of tests positive for RSV is stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In week 13 (week ending March 29, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, indicators of influenza activity continued to decrease in week 13.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week. The percentage of tests positive for influenza continued to decrease. However, trends vary regionally.
• COVID-19: Nationally, most indicators of COVID-19 activity showed signs of stabilization at low levels. The percentage of tests positive for COVID-19 is stable at the lowest recorded values seen this surveillance year (which began August 25, 2024).
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are stable. The percentage of tests positive for RSV is stabilizing.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In week 12 (week ending March 22, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, indicators of influenza activity continued to decrease in week 12.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week. The percentage of tests positive for influenza continued to decrease. However, trends vary regionally.
• COVID-19: Nationally, most indicators of COVID-19 activity showed signs of stabilization at low levels. The percentage of tests positive for COVID-19 is showing signs of stabilization at the lowest recorded values seen this surveillance year (which began August 25, 2024).
• RSV: Nationally, most indicators of respiratory syncytial virus (RSV) activity are decreasing. The percentage of tests positive for RSV has gradually decreased over the past four weeks.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In week 11 (week ending March 15, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, indicators of influenza activity continued to decrease in week 11.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week. The percentage of tests positive for influenza continued to decrease. However, trends vary regionally.
• COVID-19: Nationally, most indicators of COVID-19 activity continue to decrease. The percentage of tests positive for COVID-19 is showing signs of stabilization at the lowest recorded values seen this surveillance year (which began August 25, 2024).
• RSV: Nationally, indicators of respiratory syncytial virus (RSV) activity are decreasing. The percentage of tests positive for RSV has gradually decreased over the past four weeks.

In Week 10 (week ending March 8, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, indicators of influenza activity continued to decrease in week 10.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week. The percentage of tests positive for influenza continued to decrease. However, trends vary regionally.
• COVID-19: Nationally, indicators of COVID-19 activity are decreasing. The percentage of tests positive for COVID-19 continues to remain at its lowest levels recorded since the start of the 2022-23 season.
• RSV: Nationally, indicators of respiratory syncytial virus (RSV) activity are decreasing or stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.
• The World Health Organization has released its recommended composition of the northern hemisphere influenza vaccine for use in the upcoming 2025-2026 season. The recommended strains were changed for the A(H3N2) component compared to the current 2024-2025 northern hemisphere vaccine.

In Week 9 (week ending March 1, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, indicators of influenza activity decreased in week 9.

• Influenza: Nationally, indicators of influenza activity decreased in the most recent reporting week. The percentage of tests positive for influenza decreased, suggesting that Canada may have reached peak influenza percent positivity in week 8. Regional trends vary substantially.
• COVID-19: Nationally, indicators of COVID-19 activity are decreasing or stable at low levels. The percentage of tests positive for COVID-19 is now at its lowest value since the start of the 2022-23 season.
• RSV: Nationally, indicators of respiratory syncytial virus (RSV) activity are decreasing.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In Week 8 (week ending February 22, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, influenza activity is widespread in only some regions of the country.

• Influenza: Nationally, indicators of influenza activity are increasing but showing signs of stabilizing. The percentage of tests positive for influenza is now at its highest value since the start of the 2020-21 season, but the rate of increase slowed in the most recent surveillance week. Regional trends vary substantially.
• COVID-19: Nationally, indicators of COVID-19 activity are decreasing or stable. The percentage of tests positive for COVID-19 is now at its lowest value since the start of the 2022-23 season.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity continues to decrease.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In Week 7 (week ending February 15, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, influenza activity is widespread in only some regions of the country.

• Influenza: Nationally, indicators of influenza activity continue to increase. The percentage of tests positive for influenza is now at its highest value since the start of the 2020-21 season.
• COVID-19: Nationally, indicators of COVID-19 activity continue to decrease. The percentage of tests positive for COVID-19 is now at its lowest value since the start of the 2022-23 season.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity continues to decrease.
• The percent positivity of all other respiratory viruses is following historically observed trends.
• Syndromic activity: The percentage of volunteer FluWatchers reporting cough and fever increased slightly in week 7 and is similar to expected levels from past seasons.

In Week 6 (week ending February 8, 2025) In Canada, influenza activity is the highest among respiratory viruses under surveillance. However, influenza activity is widespread in only some regions of the country.

• Influenza: Nationally, indicators of influenza activity are increasing. The percentage of tests positive for influenza has matched the highest value recorded since the start of the 2020-21 season.
• COVID-19: Nationally, indicators of COVID-19 activity continue to decrease. The percentage of tests positive for COVID-19 has reached its lowest value recorded since the start of the 2022-23 season.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity continues to decrease.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In Week 05 (week ending February 1, 2025) In Canada, percent positivity is currently highest for influenza, RSV and SARS-CoV-2 (the virus that causes COVID-19).

• COVID-19: Nationally, indicators of COVID-19 activity are decreasing.
• Influenza: Nationally, most indicators of influenza activity are stable. Hospitalizations and outbreaks associated with influenza are currently stable, while influenza percent positivity increased.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity is stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In Week 04 (week ending January 25, 2025) In Canada, percent positivity is currently highest for influenza, RSV and SARS-CoV-2 (the virus that causes COVID-19).

• COVID-19: Nationally, indicators of COVID-19 activity are decreasing.
• Influenza: Nationally, most indicators of influenza activity are stable. Hospitalizations and outbreaks associated with influenza are currently stable, while influenza percent positivity increased.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity is stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In Week 03 (week ending January 18, 2025) In Canada, percent positivity is currently highest for influenza, RSV and SARS-CoV-2 (the virus that causes COVID-19).

• COVID-19: Nationally, indicators of COVID-19 activity are decreasing.
• Influenza: Nationally, most indicators of influenza activity are stable. Hospitalizations and outbreaks associated with influenza are currently stable, while influenza percent positivity increased in week 03.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity is stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In Week 02 (week ending January 11, 2025) In Canada, percent positivity is currently highest for influenza, RSV and SARS-CoV-2 (the virus that causes COVID-19).

• COVID-19: Nationally, indicators of COVID-19 activity have been stable.
• Influenza: Nationally, most indicators of influenza activity remained stable from the previous week.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity is stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.

In Week 01 (week ending January 4, 2025) In Canada, percent positivity is currently highest for influeza, RSV and SARS-CoV-2 (the virus that causes COVID-19).

• COVID-19: Nationally, indicators of COVID-19 activity have been stable.
• Influenza: Nationally, indicators of influenza activity are increasing.
• RSV: Nationally, respiratory syncytial virus (RSV) percent positivity is stable.
• The percent positivity of all other respiratory viruses is following historically observed trends.

FluWatch Reports - Public Health Agency of Canada provides updates on flu activity across the country. Subscriptions to the service are free-of-charge. Reports indicate type of Influenza virus that is circulating in all major regions of the country. Influenza and other respiratory viruses are monitored weekly and results reported every Thursday in the Respiratory Virus Detections in Canada Report.

For more information: https://health-infobase.canada.ca/respiratory-virus-surveillance/#summary