A Personal Realization About Immunity
When I was a child, my parents made sure I received all the necessary vaccinations. Among them was the MMR vaccine for measles, mumps, and rubella. Like many others born in the 1960s, I assumed that once vaccinated, I was protected for life. Fast forward a few decades, and that assumption faced unexpected scrutiny.
During the process of enrolling in graduate school at age 53, I was required to submit proof of my immunizations. Luckily, my mother had preserved my vaccination records, carefully handwritten on yellowed paper. I thought sharing this record would suffice, but my doctor explained that these weren’t official records and suggested a titer test instead.
This test, which measures antibody levels in the blood, revealed a shocking result. Although my immunity for rubella was adequate, my immunity for measles and mumps was insufficient. Despite receiving two doses of the MMR vaccine as a child, I needed a booster to ensure protection.
This incident left me perplexed and prompted me to explore why my immunity had waned and if others might unknowingly face a similar risk.
Understanding Vaccine History and Immunity
From 1963 to 1967, children like me received either an inactivated measles vaccine or a live one. However, the inactivated vaccine was later found to be less effective and was discontinued. According to experts, adults vaccinated with the inactivated vaccine may still be at risk for measles.
Additionally, before 1989, the Centers for Disease Control and Prevention (CDC) recommended only one dose of the MMR vaccine. A second dose was added to the recommendations in 1989 to enhance immunity in those who didn’t fully respond to the first shot. Those born before 1989 may have received just one dose, leaving them potentially vulnerable to outbreaks.
Should You Be Concerned?
If you were vaccinated between 1963 and 1967, received only one dose of the MMR vaccine, or are unsure about your vaccination record, you may want to take action. A titer test can provide clarity on your immunity, though it may be simpler and cost-effective to get re-vaccinated.
For those born before the vaccine era, particularly before 1957, the CDC assumes immunity since measles was widespread at the time, meaning most individuals were likely exposed to the virus and developed natural immunity.
The Importance of Measles Immunity
Measles is among the most contagious viruses in the world, with one infected person capable of spreading it to up to 18 others in an unvaccinated setting. The risks of complications, such as pneumonia, encephalitis, or even death, underscore the importance of maintaining immunity.
Although immunity levels may decline slightly over time, experts emphasize that memory cells in the immune system can still fight the virus. However, widespread misinformation about the vaccine continues to pose challenges to maintaining high immunity levels across populations.
What You Can Do
- Check Your Vaccination Status
If you’re unsure whether you’re fully vaccinated, consult your healthcare provider. They may recommend a titer test to verify your immunity or suggest an MMR booster.
- Consider Getting a Booster
If you were vaccinated in the 1963–1967 era or before the second-dose recommendations came into effect, a booster shot can ensure you’re protected.
- Stay Updated
Follow CDC guidelines and ensure your family members, especially children, are up to date on vaccinations.
- Educate and Spread Awareness
Share accurate information with loved ones to combat misinformation, emphasizing the importance of vaccination in preventing outbreaks.
Take Responsibility for Community Health
Measles outbreaks remain a concern despite advancements in vaccines. Ensuring individuals are protected is not just about personal health but also about protecting the community, especially those who cannot be vaccinated due to medical reasons.
I learned firsthand that our assumptions about immunity can sometimes be incorrect. By proactively confirming vaccination status and staying informed, we can protect ourselves and contribute to greater health security for everyone.
If you’re unsure about your immunity, contact your healthcare provider today. It’s never too late to make a proactive decision for your health and the well-being of those around you.
Stay vaccinated. Stay protected.
