Public health experts are warning of a ‘quad-demic’ this winter. Here’s where flu, COVID, RSV, and norovirus are spreading Taking precautions to protect yourself from the quartet of infectious diseases can lessen your odds of bringing an illness into the new year. Lindsey Leake Fortune

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The Department of Health and Human Services (HHS), of which the Centers for Disease Control and Prevention (CDC) is a part, often breaks the country up into 10 regions when mapping illnesses. The week ended Dec. 7, activity of influenza-like illness was elevated nationwide except in Region 8—Colorado, the Dakotas, Montana, Utah, and Wyoming—where the level was normal. ...

Nationwide, the A (H3) strain of influenza accounted for the plurality of infections the three weeks ended Dec. 7, CDC records show.

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