Canada, US: Elevated seasonal influenza activity continues across both countries as of Nov. 17

Event

Public health officials report elevated seasonal influenza activity across Canada and the US, with 34,280 confirmed cases reported Aug. 28-Nov. 5. Data through Nov. 5 reports 32,046 confirmed cases in the US, and 2,234 confirmed cases in Canada. In 2021, over a similar period, the region reported 357 cases, with 320 confirmed cases in the US, and 37 confirmed cases in Canada. Health authorities urge individuals to get vaccinated against influenza. Additional cases will likely be identified in the coming weeks as disease surveillance continues. This represents the most updated information available as of Nov. 17.

Context

Seasonal influenza activity typically peaks in North America’s colder months, usually November-March. Lower seasonal influenza activity was reported in both Canada and the US during the COVID-19 pandemic in 2020-2021 (US: 1,675 confirmed cases, Canada: 69 confirmed cases), as stringent health precautions implemented to decrease the spread of COVID-19 likely also hampered the spread of influenza.

Seasonal influenza is a highly contagious disease caused by a virus. Symptoms typically appear two days after exposure but can develop up to four days after exposure. Typical symptoms are nondescript, including fever (though not in all cases), cough, congestion, aches, and fatigue. The disease occurs in all age groups but is particularly severe in the elderly or persons with high-risk medical conditions. Influenza vaccinations are recommended yearly since the influenza virus undergoes frequent changes.

Advice

Visit a doctor to ensure vaccination against seasonal influenza. Practice basic health precautions. Seek medical attention if symptoms develop within a week of being in affected areas.