CDC reports more U.S. kids died from this flu season in 15 years, while the measles outbreak expands outside the U.S.

A bout of measles sends the immune system into shock, demolishing critical cells that help our bodies respond to threats.

President Donald Trump is set to meet Canadian Prime Minister Mark Carney, who was elected last week following a campaign ...

Vaccines work by imitating an infection to teach the body how to recognize and defend itself from disease without experiencing the dangers of an actual infection, according to the CDC.