U.S. flu cases rise as COVID levels decline--CDC

US flu markers show more rises as COVID levels decline Test positivity for flu rose to 25%, with emergency department visits very high and affecting all age-groups. CIDRAP

In its regular weekly snapshot on respiratory virus activity, the Centers for Disease Control and Prevention (CDC) said that illness levels remain high, mainly due to impacts from the flu season.

For flu, emergency department (ED) visits are very high, and test positivity—after leveling out a bit after the holidays—rose to 25% for the week ending January 18. The CDC added that ED visits for flu are rising in all age-groups. ED visits trended slightly downward after the holidays but have now started to rise again.

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