A new study reveals that kidney disease compromises the survival of infection-fighting cells and reduces the immune response to the flu.

New combination tests for flu and COVID-19 are here. An expert explains everything you need to know about the new tests.

New research in mice finds that having recovered from COVID had a protective effect against the worst effects of the flu.

A new study in animals suggests getting a flu shot after having the flu amplifies immunity, researchers say.

Intensive meat production may have contributed to a large increase in animal-to-human disease outbreaks occurring in Asian countries.

Most flu viruses enter human or animal cells through specific pathways on their surface. Researchers have now found a second entry pathway.

New findings underscore the heightened risk of bird flu exposure for dairy farm workers.

Bacteria in the gut influence how susceptible mice are to respiratory virus infections and the severity of these infections, research finds.

An expert shares tips to help you and your loved ones navigate a season of flu, COVID, RSV, and more.

An epidemiologist explains what you should know for respiratory virus season after last year's "tripledemic" of flu, COVID, and RSV.