Plenty of people – about 1 in 3, according to some studies — feel bad for a day or two after they get a flu shot. The most ...

Flu cases and hospitalizations are surging, overwhelming some hospitals across the U.S. Here's where flu activity is highest, ...

Across all domains of life, immune defenses foil invading viruses by making it impossible for the viruses to replicate. Most ...

Within hours of getting inked, pigments begin migrating through your body, building up in immune tissues and triggering ...

The immune system’s first encounter with a virus or vaccine establishes a “starting template” that shapes its response to new ...

A Buncombe County family had visited Spartanburg County, SC, one to two weeks before the children became sick with measles.

Nearly one in four emergency and urgent care visits last week were tied to respiratory illnesses such as the flu, COVID-19, ...

At least 11 million people have gotten sick, and 5,000 people have died from the flu this season, according to the CDC.

Low vaccination rates and a rapidly spreading influenza A strain are pushing toward an early, intense flu season.

The COVID vaccine program for children 6 months old and up now uses a shared decision-making approach because children have ...

CDC officials said the revisions follow a directive from the Trump administration to align U.S. vaccination policy more ...