The XFG COVID-19 variant, aka "Stratus," is spreading rapidly in the U.S. as cases climb. Here's what to know about symptoms ...
There is a new flare in Delhi’s air; almost every home appears to have at least one member who's sick but not actually sick.
H3N2 typically begins with a sudden high fever, chills, sore throat, persistent cough, headache, and severe fatigue.
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