Researchers discovered the worst COVID offenders.
"There's no question there are certain groups of Americans at higher risk."
A test is the only way to know for sure if you've had COVID, but there are signs that indicate you've had the virus.
Experts explain what to know about long COVID and signs that indicate you have it.
These weird symptoms could be COVID.
Experts explain why COVID reinfections are potentially dangerous and share the best ways to help avoid the virus.
Doctors share five things to know about the winter surge of COVID, influenza and RSV.
New research shows alarming long COVID symptoms.
How to know about COVID right now and how the virus is changing, according to experts.
Doctors warn to be careful of these COVID symptoms.
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