H3N2

• Flu numbers in Canada remain high but trending down after winter holidays

  During the week of Christmas, Health Canada said the percentage of positive tests for influenza reached a three-year high of 33.3 per cent.

  Canada

  Jan 9
  
• 1 in 3 U.S. flu tests positive over holidays as Canada set to reveal data

  The U.S. Centers for Disease Control and Prevention said around one in three (32.9 per cent) of influenza tests came back positive for the week ending Dec. 27, 2025.

  Canada

  Jan 6
  
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• H3N2 flu is surging — and just had the ‘perfect environment’ for a spike

  In the week ending Dec. 20, one in four (25.6 per cent) of every influenza test conducted in the U.S. came back positive, the U.S. CDC said.

  Health

  Jan 2
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• As H3N2 sweeps across Canada, what to know about flu’s heart attack risk

  An influenza infection brings with it an increased risk of heart attack and stroke, data published in the Journal of the American Heart Association says.  

  Health

  Dec 23, 2025
• As H3N2 spreads, can you still get your flu shot before holiday gatherings?

  The rate of flu hospitalization in Canada has nearly doubled compared to the previous week of available data, with infections now up almost 30 per cent, Health Canada data shows.

  Health

  Dec 22, 2025
• Flu hospitalizations rise sharply as H3N2 spreads across Canada

  For the week ending Dec. 13, Canada saw 11,646 new cases of the flu being detected, which means 27.7 per cent of all the tests conducted in the country came out positive.

  Health

  Dec 19, 2025
• This H3N2 flu strain is spreading ‘rapidly.’ Why subclade K is hitting hard

  Children are among those being hit hard this flu season, with most infections being detected in people under 19, according to Health Canada.

  Health

  Dec 17, 2025
• Calgary is one of the country’s hot spots for influenza: Health Canada

  The city of Calgary and surrounding area have become one of several hot spots for flu outbreaks across the country in recent weeks according to Health Canada.

  Health

  Nov 25, 2025
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• Flu season: Why are so many Canadian children falling sick?

  The flu season started early this year in Canada, doctors say, which means kids started getting sick earlier.

  Health

  Dec 16, 2022
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• Why this year’s flu season could be particularly dangerous for kids

  So far, more than 3,200 cases of flu have been reported across Canada since the end of August.

  Dec 24, 2019