Four viruses are circulating in the U.S., sparking concerns of a possible “quademic." Here's what to know about risk factors ...

Kate Colby, MPH, is a public health expert with extensive experience in infectious disease epidemiology. Marley Hall is a writer and fact-checker for Health.com specializing in medical and health ...

Flu virus is trending high right now, and things are especially miserable in the South, Southwest, and western U.S.

The flu circulates year round, but there are tons of misconceptions about it. Here's the truth about the flu. Are colds and flu the same thing? No. Although colds and flu are both respiratory ...

People who catch norovirus have been urged by the NHS to stay at home while they recover as cases of the illness surged ...

A highly pathogenic strain of H5N1 influenza, also known as avian flu, that plagued Europe and North America all ... experts concerned that the infection has become an endemic, year-round risk to ...