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.

Public health experts say some adults should consider getting revaccinated, particularly older adults who were born after 1957 and were vaccinated before 1968.

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