Scientists are uncovering a new possibility behind long COVID’s stubborn symptoms: hidden infections that awaken or emerge alongside SARS-CoV-2. Evidence is mounting that viruses like Epstein-Barr and ...

Angela Read thought she had a sinus infection, soon she discovered her condition was much more serious. She's grateful to the ...

Norovirus levels are increasing across California, and the rise is especially notable in the San Francisco Bay Area and L.A., ...

It may feel like you are surrounded by sniffles and coughs, but flu season activity is still low in many parts of the U.S.

The symptoms of COVID-19 have changed over time. Here, infectious disease doctors share what many people are experiencing ...

For millions suffering from long COVID, their persistent breathlessness, brain fog and fatigue remain a maddening mystery, but a group of leading microbiologists think they may have cracked the case.

A new study identifies a mechanism for how COVID vaccines may, in infrequent cases, drive heart inflammation, a condition ...

When you start to feel sick, it can be hard to tell which respiratory virus you’ve been hit with. The flu and COVID share a ...

For millions suffering from long COVID, their persistent breathlessness, brain fog and fatigue remain a maddening mystery, ...

So far, just 36 percent of U.S. children have been vaccinated—down 23 percent from a half-decade earlier, likely due to ...

It's once again the time of year for an uptick in illnesses such as colds, the flu, COVID and RSV. Here are the signs and ...