- Flu season in the US is heating up, driven by new subclade K variant CNN
- The ominous new ‘K’ flu variant is spreading as flu shot rates fall UCHealth
- New flu strain, H3N2 subclade K, spreads across the U.S. as cases rise WZZM13.com
- Doctors warn of potentially stronger flu season as new variant emerges First Alert 4
- What we know about flu variant A/H3N2 K: The strain behind 90 per cent of cases The Independent
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