Influenza, or the flu, is a contagious respiratory virus. It can be a severe illness that affects the nose, throat and sometimes lungs. Symptoms of influenza are sore throat, cough, congestion, ...

It's that time of year! People are spreading holiday cheer — and germs, leading to sicknesses like COVID, flu, RSV, pneumonia and more. But how long are you contagious? Dr. Carla Garcia Carreno, ...

"You're just going to have these long-haul symptoms." Yet because of how rare long haulers are, and how new the research around COVID is, many experts are still cautious about making sweeping ...

Individuals infected with the coronavirus are most contagious once they’ve started displaying symptoms of the illness, but science still isn’t sure whether it can be spread while it’s incubating — and ...