The U.S. government is mailing out another round of free COVID tests to households that sign up. Older COVID tests still may be in your cupboard and OK to use, but you must verify the test’s ...

You wake up with a scratchy throat, runny nose, and persistent cough, but your at-home COVID-19 test reads negative. How is this possible? The short answer is yes—you can still be infected. Many other ...

Breaking out the tissues? It's that time of year! But what kind of sickness do your symptoms point to? As the weather changes, we can start feeling under the weather too — but while each illness has a ...

Do you have a sore throat, a runny nose and muscle aches? It could be a common cold, a case of the flu -- or COVID-19. The illnesses all share similar symptoms, sometimes making it hard to distinguish ...

COVID and flu tests aren't designed to tell you how sick you are, but if you use them to monitor your infection, they can provide useful information.