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

In a hard-to-watch video, a healthy-looking 4-year-old boy lies on a bed as doctors lift his eyelids to watch his big brown ...

Health and Human Services Secretary Robert F. Kennedy Jr. said the measles vaccine is "leaky" because its effectiveness wanes over time, something medical experts dispute. Kennedy, a vaccine ...

Measles cases have also been reported in more than 20 other states. Without vaccination, measles can be dangerous or even deadly. While most people's symptoms improve, 1 in 5 unvaccinated people ...

With measles cases in more than 20 states across the U.S., doctors and health officials are urging anyone who hasn't received the MMR vaccine to get vaccinated. "To be very clear, the number one ...

Though highly contagious, measles is preventable. The measles, mumps and rubella (MMR) vaccine is the best way to prevent a measles infection, according to the CDC. The MMR vaccine is safe and ...

As the measles outbreak in Texas spreads, attention is turning to what is commonly called the MMR vaccine. The vaccine is the only way to prevent measles, but it also prevents other illnesses.