One person has died, 200 are under observation and a hospital is under quarantine. Here’s what matters most to experts.

Health guidance outlines key differences between plague and other infectious diseases after a suspected Russian case.

A new study has found that certain bacteria living in the nose may influence how likely someone is to get a COVID-19 infection. The research reveals that certain types of nasal bacteria can affect the ...

The U.S. government is monitoring reports that a laboratory worker in Russia died​ from the pneumonic plague.

HONG KONG - Gut bacteria may influence the severity of COVID-19 in a person, as well as their immune response to the virus, a new study suggests. The human body is made up of trillions of bacteria, ...

Everyone's home for the holidays — and so are the germs. It's possible sickness could be knocking on the door along with your party guests. It's cold and flu season, and common winter illnesses such ...

As much as most of us are all trying to limit our exposure to the outside world, some people still need to go out to work, and many need to go to the store, pharmacy or gas station. But experts say ...

COVID-19 activity remains low, but infections and positive tests are increasing in New York and across much of the country as summer comes to an end.

A new study by researchers at George Washington University has found that certain bacteria living in the nose may influence how likely someone is to get a COVID-19 infection. "We've known that the ...