There’s no solid evidence that thimerosal harms children. It was removed from almost all vaccines more than 20 years ago out of an abundance of caution, but RFK Jr.’s hand-picked vaccine advisory committee is looking into it.

Avian influenza infections in the US have been rising over the past year, but there’s no evidence so far that people can infect each other with this strain of the virus.

How are scientists and farmers are working to adapt to bird flu? An expert helps make sense of the latest developments.

More than a century ago, the US learned what happens when there is no national response to a major health crisis.

With the devastating 1918 pandemic in mind, US health officials saw an outbreak in Asia and swung into action. What happened offers lessons for today.

Researchers have come up with a new way to identify more infectious variants of viruses or bacteria that start spreading in humans - including those causing

Cold and flu viruses often circulate more in the fall and winter, but there are some time-tested strategies for avoiding them, such as vaccines, handwashing and staying active.

A fever and a nasty cough can be symptoms of a range of respiratory illnesses. An antigen test that narrows down the culprits can speed up diagnosis and recovery.