New research reveals that even mild respiratory infections can leave lasting biological changes. However, COVID-19 stands apart, with unique effects on the brain that may help explain long COVID.

The novel coronavirus that causes COVID-19 has spread globally, killing hundreds of thousands of people and infecting millions more. The pandemic has upended life around the world, crippling the ...

If you're worried about having COVID-19, the illness caused by the novel coronaivus, here's the topline guidance from the Centers for Disease Control and Prevention: "If you have a fever or cough, you ...

Add Yahoo as a preferred source to see more of our stories on Google. What are the most common COVID-19 symptoms doctors are seeing in October 2025? Read on to find out what to look out for, how to ...

Researchers discover that COVID-19 uniquely causes brain inflammation and disrupts serotonin/dopamine pathways, explaining "brain fog" in Long COVID.

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 ...

How the body responds to COVID-19 will vary from one person to the next, and the same goes for the recovery period from the virus. How long it’ll take to recover from COVID-19 is always going to be ...

Another year is drawing to a close, with another strain of the coronavirus making the rounds. But this time, medical professionals say it might be harder to distinguish whether you have COVID-19, the ...

In high-risk patients with COVID-19, nirmatrelvir/ritonavir treatment shortened the median duration to return to usual health and activities and significantly accelerated the resolution of COVID-19 ...

The federal government program that mailed free at-home COVID-19 tests to households is no longer active. Some insurance providers may still cover the cost of at-home tests, and free tests may be ...

If you partied hard or just enjoyed seeing family during the winter holidays (whether it was Christmas, Hanukkah, Kwanzaa, New Year’s Eve or all of them!), chances are you were exposed to their germs.