The 1918-1919 flu pandemic killed millions.

A disease the federal government declared “eliminated” nearly two decades ago is surfacing again.

The seasonal return of two unpleasant viruses offers a reminder for good hygiene and vigilance.

An expert weighs in on how the illnesses tied to romaine lettuce can strike so many, so quickly — and what to watch for as

Learn more about acute flaccid myelitis, a perplexing and very rare illness that causes paralysis in children.