New evidence suggests that many Americans who travel abroad may wind up bringing home some unintended souvenirs.

Measles may seem like an ailment from a bygone era, but new evidence suggests that many US children may still be at risk today.

In its effort to put a stop to the AIDS epidemic by 2030, the World Health Organization (WHO) has made some big changes to its guidelines for global HIV treatment.

Newfound support may give an experimental flu medication the boost it needs to become available for use.

Adults who get their yearly flu vaccines may wind up protecting more than just themselves.

A single pill could soon become an important tool in the fight against HIV.

Cucumbers are thought to be behind a salmonella outbreak that has sickened hundreds across the US in recent weeks.

The flu can be particularly dangerous for seniors, but early treatment with one kind of medication may help.

Fewer itchy rashes and missed school days may only be a few of the benefits of the chickenpox vaccine.

Knowing how common a certain condition is can help prepare health care systems to treat patients. But the estimates for one disease may be way off.