What’s In The Measles Vaccine? (MentalFloss.com)

In the 1950s, 3 to 4 million people got measles every year in the United States. Scientists developed a vaccine for the highly contagious respiratory disease in 1963, and by 2000, the disease was effectively eliminated from American soil. But unvaccinated people continue to contract the disease.

http://www.mentalfloss.com/article/61502/whats-measles-vaccine