What to know about 'quad-demic' of COVID, flu, RSV and norovirus in US
The U.S. is seeing a "quad-demic" as cases of COVID-19, flu, RSV and norovirus spread at the same time. Experts said this is what you need to know.
USA Today22d
Where are flu rates surging? See maps
Unable to view our graphics? Click here to see them. Is it the flu, COVID, a cold, or something else? Respiratory viruses, like the common cold, have similar symptoms to COVID-19 and the flu.