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A rise in cases of a contagious lung infection across the United States is causing alarm, especially for parents of young children. Walking pneumonia usually sickens school-aged children and teens, but this year, toddlers are being hit the hardest. . ...

Thirteen states reported high or very high levels of flu-like illness last week, about double from the week before.

Missouri residents who grew up near contaminated nuclear waste, leftover from the Manhattan Project in St. Louis, say they are tired of waiting.

The VA is now facing urgent calls to quickly finalize a policy that would enable disability compensation for former service members who suffer from this debilitating lung condition, with a political deadline looming in less than five weeks.

Short sleepers cruise by on four to six hours a night and don't seem to suffer ill effects. Turns out they're genetically built to require less sleep than the rest of us.

A person in Louisiana has the first severe illness caused by bird flu in the U.S., health officials said Wednesday.

While the numbers are finally starting to decline, more than 74,000 Americans are still dying every year from opioid overdoses. Despite that, very few people who are struggling with addiction get treatment. William Brangham looks at the renewed focus ...

Towana Looney is the fifth American given a gene-edited pig organ in a quest to make animal-to-human transplants a reality.

Holidays and special occasions can amplify the pain, leaving those grieving feeling isolated and overwhelmed.

The statement by Senate Republican leader Mitch McConnell, who had polio as a child, appeared to be directed at Trump's pick for health secretary, Robert F. Kennedy Jr., after a report that one of his advisers filed a petition to revoke approval for ...