Flu cases and hospitalizations are surging, already breaking last season's records. Here's where activity is highest, what ...

Respiratory virus season is in full swing across California, with several illnesses spreading across the state. Cases of ...

Six years since the first documented case of COVID-19 outside of China, the virus accounts for just a relatively few serious cases.

The CDC says Texas flu is at "very high" levels, as the flu vaccine has been less effective against H3N2 subclade K.

The adenovirus is a new strain that attacks the respiratory system, eyes, kidneys and, other organs seemingly in minutes — ...

Experts say COVID-era safety provisions are now central to how long-term care homes manage infectious disease.

A particularly infectious subvariant of influenza is keeping emergency room numbers high and causing especially severe ...

Subclade K (previously known as J.2.4.1) is gaining attention because it appears to be spreading much earlier in the flu ...

California officials warn of an increase in flu-related hospitalizations and confirm a second severe-flu-related death.

It's called the XFG variant, but it's better known as "Stratus." That's the name of the latest COVID-19 strain going around. Variant XFG, colloquially known as "Stratus," was first detected in ...

The U.S. is facing its worst flu season in 25 years, according to the Centers for Disease Control and Prevention, which ...