Vaccination provides long-lasting 97% protection against measles infection. Most people who have been vaccinated do not need to be vaccinated again.

For those who were vaccinated for measles many decades ago, there’s a chance the protection has worn off by now. Here's how to determine whether you need a booster.

Measles had been largely eliminated entirely in the United States as of around 2000 thanks to vaccination and its consequent herd immunity, but unfortunately made a comeback in re