Weekly influenza reports

April 7 to April 13, 2024 (week 15)

• In week 15, the percentage of tests positive for influenza was 7.8% and a total of 2,254 laboratory detections (525 influenza A and 1,729 influenza B) were reported.

Syndromic

• The percentage of FluWatchers reporting cough and fever was 0.9% in week 15. The percentage of FluWatchers reporting cough and fever remains below expected levels for this time of year.

Outbreaks

• From August 27, 2023 to April 13, 2024 (weeks 35 to 15), 1,166 laboratory-confirmed influenza outbreaks have been reported (8 laboratory-confirmed influenza outbreaks were reported in week 15).

Severe Outcomes

• From August 27, 2023 to April 13, 2024 (weeks 35 to 15), 4,205 influenza-associated hospitalizations were reported by participating provinces and territories. Adults aged 65 years of age and older accounted for 46% of reported hospitalizations. The highest cumulative hospitalization rates were among adults 65 years of age and older (131/100,000) and children under 5 years of age (91/100,000).
• From October 1, 2023 to April 13, 2024 (weeks 40 to 15), 1,022 influenza-associated pediatric hospitalizations were reported from a total of 4,145 positive influenza tests across nine sentinel hospital sites.

Other Notes

• Weekly reporting of laboratory detections of influenza, SARS-CoV-2, and other seasonal respiratory viruses will continue via our Respiratory Virus Detections Surveillance System.