Acetaminophen isn't any better at relieving back pain than a fake pill, despite almost universal recommendations to take the drug, according to the first big trial to test...

No batteries required: Scientists are creating a biological pacemaker by injecting a gene into the hearts of sick pigs that changed ordinary cardiac cells into a special kind that induces a steady...

The director of the U.S. Centers for Disease Control and Prevention acknowledged Wednesday that systemic safety problems have for years plagued federal public health laboratories that handle dangerous...

U.S. government workers cleaning out an old storage room at a research center near Washington made a startling discovery last week — decades-old vials of smallpox packed away and forgotten in a...

Bone marrow transplants can reverse severe sickle cell disease in adults, a small study by government scientists found, echoing results seen with a similar technique used in children.   The...

The rate of HIV infections diagnosed in the United States each year fell by one-third over the past decade, a government study finds. Experts celebrated it as hopeful news that the AIDS epidemic may...

The most advanced vaccine for dengue only offers modest protection but could still help millions of people avoid the devastating effects of the disease known as "breakbone fever," according...

On a recent morning in London, Lara Thomson practiced spinning on benches, swinging from metal bars and balancing off raised ledges — all elements of a daredevil discipline known as...

More than a dozen Americans — including cancer patients, their family members and physicians — called on U.S. health regulators on Friday to block the use of electronic surgical tools used...

A U.S. girl born with the AIDS virus and in remission for years despite stopping treatment now shows signs that she still harbors HIV — and therefore is not cured. The news is a setback to hopes...