Super Flu Virus Update: 91 Flu Outbreaks In Canada, What Makes Subclade K Spread Rapidly, Explain Doctors

Super Flu Virus Update: 91 Flu Outbreaks In Canada, What Makes Subclade K Spread Rapidly, Explain Doctors

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Updated Dec 19, 2025 | 06:50 AM IST

SummaryCanada is facing a rapid surge of ‘super flu’ driven by influenza A (H3N2) subclade K. Cases, outbreaks, positive tests and hospitalizations are rising nationwide, with children hardest hit. Deaths in Ottawa prompted vaccination appeals, as experts warn a severe season, worsened by travel during the December holiday period nationwide surge.

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