#DYK measles is highly contagious, especially in children younger than 5 but anyone who is not protected can get it? If one person has measles, up to 9 out of 10 people nearby can become infected if they are not protected. The best protection against measles... (cont. below)

...is the measles, mumps, and rubella (MMR) vaccine. Two doses of MMR vaccine are about 97% effective at preventing measles; one dose is about 93% effective. Talk to you your health care provider about the MMR vaccine, especially if you are planning to travel.