Do I Need a Measles Booster or a Measles Vaccine?

This content was reviewed and approved by Jacqueline Gisch RN, MSN

Vaccination remains our strongest defense against measles—a highly contagious virus that once led to severe outbreaks. Most of us receive the measles vaccine during childhood as part of the MMR series, typically two doses that provide long-lasting protection. However, recent measles outbreaks, largely attributed to declining vaccination rates, have raised questions about whether an extra dose might now be necessary.

Understanding the Standard Vaccination Schedule

The measles vaccine is designed to offer enduring immunity. The first dose is generally administered to babies around 12 to 15 months of age, with a second dose when children are between 4 and 6 years old. Research shows that two doses of the MMR (measles-mumps-rubella) vaccine provide approximately 97% protection against measles. Although breakthrough cases can occur in vaccinated individuals, these cases usually present with milder symptoms. For most people, the standard two-dose schedule is sufficient for lifelong immunity.

Vaccination is a standard protective measure for many infectious diseases, such as whooping cough, and contagious viruses, such as influenza (flu).

Age-Based Considerations for Measles Immunity

Here are some additional age-based considerations for measles:

• Born prior to 1957  - You are very likely to have had measles naturally and generally do not need a booster.
• Born between 1957 and 1989 - You probably received only one injection of the current vaccine. While this provides some protection, a booster is advised to reach the optimal immunity level.
• Born between 1963 and 1967 - You likely received the inactivated virus vaccine, which isn’t as effective as today’s vaccine. A booster is recommended for enhanced protection.
• Born in 1990 or later - Routine childhood vaccinations should have given you strong immunity. The need for a booster is minimal due to the high protection levels achieved.

When Might You Need a Booster?

Even though the standard schedule is highly effective, certain situations may require reconsideration of your vaccination status:

• Incomplete Vaccination History – If you’re unsure whether you received both doses as a child, or if your records are unclear, it’s wise to discuss catch-up vaccination options with your healthcare provider.
• High-Risk Scenarios – Professionals like healthcare workers or frequent international travelers face higher exposure risks. Additionally, in areas currently experiencing outbreaks, health officials recommend verifying that your vaccinations are up to date. Adults uncertain about their vaccination history can undergo a titer test to assess immunity.

Special Considerations for Adults and High-Risk Individuals

While waning immunity in adults is rare, certain groups may require special attention:

• Unvaccinated or Under-Vaccinated Populations – Unvaccinated individuals, including young children too young for vaccination and those who have opted out due to personal beliefs, are at the highest risk during outbreaks. Communities with low vaccination rates are particularly vulnerable.
• Individual Health Factors – People with immunocompromising conditions may not develop as robust an immune response from the standard vaccination schedule. In these cases, a personalized vaccination plan or additional doses might be necessary.

Vaccination remains the most effective method to prevent measles. Maintaining high vaccination rates not only protects you but also builds community immunity, safeguarding those who cannot be vaccinated for medical reasons.

Talk With Your Doctor About Measles and Vaccination

Contact your Baptist Health provider if you have questions about the measles vaccine or the illness itself, or if you think you or your child have been exposed. They can review your vaccination history, advise on the need for additional doses or antibody testing, and guide you on the next steps. Our online provider directory is also a helpful tool for finding a Baptist Health doctor.

Next Steps and Helpful Resources

Learn More About Infectious Diseases Care at Baptist Health
Preventing Infectious Disease
What Are Measles?
Does Measles Affect Pregnancy?
What Is the Bird Flu?