Do You Need a Measles Booster?
October 06, 2026
University Hospitals Rainbow Babies & Children'sExperts in Children's Health





Recent measles outbreaks have many people understandably concerned about the highly contagious viral illness. The MMR vaccine protects against measles, mumps and rubella. Two doses are 97% effective against measles and usually provide lifelong protection.
Are You Protected?
You are considered protected against measles if you have any one of these:
- Medical records showing the recommended MMR vaccine dose(s).
- A blood test showing immunity.
- Medical records that you previously had measles.
- If born before 1957, you likely had measles as a child and are considered protected.
Recommended MMR Vaccine Schedule
Children
- First dose: 12 to 15 months
- Second dose: 4 to 6 years
Adults
- Most adults born in 1957 or later need at least one documented dose.
- Some adults at higher risk need two documented doses, given at least 28 days apart.
Do You Need a Booster?
If you received the two recommended doses of the MMR vaccine, you’re protected for life and don’t need a booster.
If you received a measles vaccine before 1968, you may have received an older, less effective version. You should get at least one dose of the current live vaccine.
What If You Can’t Find Your Records?
If you can’t find your records, talk with a healthcare provider. A blood test, called a titer, can check for immunity, but it’s not routinely needed for most people.
Getting a measles booster is generally safe for someone who may already be immune, unless you’re pregnant or have certain autoimmune diseases.