Some social media users have falsely claimed this week that “Disease X” is a virus that might be deliberately released or is even already spreading in the world. These claims are inaccurate, emerging ...

This rare virus, typically transmitted by mice and rats, is in the news because of a suspected outbreak on a cruise ship.

Imagine waking up already feeling drained, as if you never slept at all. Or noticing that your hands feel inexplicably stiff and swollen, making simple tasks like opening a jar or even typing feel ...

Our immune system has a dark side: It’s supposed to fight off invaders to keep us healthy. But sometimes it turns traitor and attacks our own cells and tissues. What are called autoimmune diseases can ...

Three cruise passengers have died aboard the MV Hondius along the coast of Africa during a suspected hantavirus outbreak. One ...

Graves’ disease is an autoimmune condition that causes hyperthyroidism and can affect the heart, eyes, muscles, and bones. It affects about 1.2% of people in the United States. Life expectancy depends ...

Heart disease continues to stand as the No. 1 cause of death in the United States. Coronary heart disease, the most common type of heart disease in the U.S., was responsible for the deaths of nearly ...

The cause of the neurological disorder—marked by uncontrollable movements—remains elusive. Yet experts say we may be entering the golden years of Parkinson’s research. At the University of Florida, ...

As in symptomatic Crohn’s disease, inflammation is occurring in the digestive tract, but symptoms may be subtle or even absent, leaving people with the condition unaware that anything is wrong. It can ...