One Dose or Two? Understanding Your Measles Protection



Hi friends,

You may have noticed measles making headlines again. Once considered eliminated in the United States, measles has returned to communities across the country, leaving many adults wondering whether the vaccines they received decades ago are still protecting them.

The good news? Most people who were appropriately vaccinated against measles remain protected for life. However, depending on when you were born, when you were vaccinated, and how many doses you received, there may be a few things worth checking.

Did you know? Before 1989, most children received only one measles vaccine dose. In 1989, recommendations changed to two doses to improve protection.

Research shows:

  • 1 dose: 93% effective
  • 2 doses: 97% effective

What Does This Mean for You?

  • Born before 1957? Generally considered immune.
  • Vaccinated between 1963 - 1967? Some received an older, less effective vaccine and may need revaccination.
  • Vaccinated before 1989? You may have received only one dose. Most adults are adequately protected, but healthcare workers, international travelers, and college students generally need two.
  • Vaccinated after 1989? Check your records to confirm whether you received two doses.

Do you need a booster? Not necessarily! One dose of MMR is sufficient for most adults, and there is no routine recommendation for a second dose simply because you were vaccinated before 1989. Certain higher-risk groups, including healthcare workers, international travelers, and college students, generally need two doses. Routine antibody testing to confirm immunity after vaccination is also not recommended.

At Powell Pharmacy, we're happy to help you review your vaccination history and determine whether additional protection is needed.


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In this episode, I sit down with my dear friend Jennifer S. Miller, a child and adolescent development expert, emotional intelligence coach, and founder of Confident Parents, Confident Kids. We talk about her new book, Humanaissance, and how parents can raise teens with courage and heart in a world shaped by technology and AI, while learning to parent ourselves too.

Jennifer reminds us that teens need help building the uniquely human skills machines can’t replicate, and that means trusting them to walk through hard things. When anger or fear shows up, pause, cool off, and come back ready to listen. And because we can’t give what we don’t have, caring for ourselves is part of parenting well. The next time fear creeps in, ask yourself: What is the courageous choice here?

References:

CDC. Measles Vaccine Recommendations. 2026.

CDC. Clinical Questions About Measles.

CDC. Measles Cases and Outbreaks. 2026.

Leung J, et al. Clin Infect Dis. 2025;80:663–672.

Davidkin I, et al. J Infect Dis. 2008;197:950–956.

This newsletter is for educational purposes only and is not intended to diagnose, treat, or replace personalized medical advice. Always consult your healthcare provider before making changes to your medications, supplements, or health routine.

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This newsletter will offer periodic health updates, suggestions and research alongside my own challenges, joys and struggles. I will offer advice regarding fun practical ideas for lifestyle changes, proper nutrition, supplementation and mindful living as we seek to live our precious lives as healthfully as possible.

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