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 ...

Respiratory viruses are continuing to spread across the United States and such activity "is expected to continue for several ...

Not anymore. In March, the Centers for Disease Control and Prevention (CDC) updated its COVID isolation guidelines based on symptoms, not time since testing positive. Bottom line: If you’re sick ...