Norovirus, the infamous "winter vomiting disease," is surging again across the United States. Norovirus is a highly contagious stomach bug that causes sudden, often violent bouts of diarrhea and ...

In the Middle Ages, a plague killed a third of Europe's population. Fleas carried the plague bacterium, Yersinia pestis, transmitting the Black Death from infected rats to millions of people. Another, ...

At least 14 states and Washington, DC, are reporting high or very high flu activity. The dominant flu strain, a version of influenza A (H3N2) called subclade K, has multiple mutations that make it ...

The flu had a glow-up. This year’s flu season is proving to be worse than normal, with hospitalizations up significantly compared to last year, and the CDC reporting 4.6 million cases of the flu so ...

Doctors and scientists say this year's influenza season could be tougher than usual. A new version of the flu virus, called H3N2, is spreading quickly. At the same time, fewer people are getting flu ...

The virus, sometimes called the stomach bug, is incredibly contagious. Here’s how to stay safe this season. By Simar Bajaj Every year, there’s a surge in norovirus cases between November and April, ...

Two cases of the deadly Marburg virus have been identified in Ghana, the first time the Ebola-like disease has been found in the West African nation, health authorities announced Sunday.