Note: Javascript is disabled or is not supported by your browser. For this reason, some items on this page will be unavailable. For more information about this message, please visit this page: About CDC.gov . Measles: Make Sure Your Child is Fully Immunized One of the best ways to protect children from measles and other vaccine-preventable diseases is to vaccinate them on time. Check your child's medical records to see if he or she is up to date on vaccinations. Measles Continues to be Brought into the U.S. So far this year, about 50 people in the United States have been reported to have measles. Most of these people were not vaccinated or did not know their vaccination status. Measles is brought into the United States by unvaccinated U.S. residents and foreign travelers who get infected when they are in other countries. They can infect others, which can lead to outbreaks. Most adults born before 1957 had measles as children. They might remember being sick for a few days with a rash and fever. And they might recall that other children in their school or neighborhood had measles at the same time. Some children developed severe complications, like pneumonia or encephalitis (swelling of the brain), or even died from measles. Today, thanks to vaccines, very few children in the United States get measles. The number of people with measles has decreased by more than 99% since a measles vaccine was licensed in 1963. But, to keep people protected against measles,