With measles making a comeback in the US, those vaccinated before 1967 could be at risk. Here's what you need to know.
Measles Outbreaks Surge: A Growing Concern for Older Americans
Measles, once considered nearly eradicated in the United States, is making a dramatic and troubling comeback. In fact, the number of cases has already surpassed all of 2024’s totals, with states like Texas reporting over 500 cases alone. This sudden resurgence is not just a cause for concern—it’s a wake-up call for everyone, particularly those born before 1967, who may not be fully protected against this highly contagious disease.
While most individuals who received two doses of the MMR (Measles, Mumps, and Rubella) vaccine have around 97% immunity, those vaccinated prior to 1967 may find themselves at risk. Why? The answer lies in the type of vaccine they received.
The Critical Vaccine Shift: Killed Virus vs. Live Virus
Before 1967, the MMR vaccine was created using a “killed” virus, meaning the pathogens were inactivated before being used in the vaccine. While this still provided some immunity, it was less effective than the “live” virus vaccines introduced in 1967 and beyond.
The live virus vaccines have proven to be far more effective at building lasting immunity. Those vaccinated with the killed virus versions may not have received the full protection that is now standard in modern vaccines. This is why if you were vaccinated before 1967, your immunity might not be as robust, and you could be more susceptible to contracting measles.
Is the Immunity from the Old Vaccine Enough?
As Dr. Erica Kaufman West, Director of Infectious Diseases at Franciscan Physician Network, explains, the older vaccine did offer some immunity, but it simply isn’t as effective as the live virus vaccines that followed. “They do have some immunity, so it’s not like they’re walking around with no antibodies,” she notes. However, the immunity generated from the killed virus was never as strong, which is why those vaccinated before 1967 are now being advised to consider a booster shot.
Booster Shots: A Simple Solution to Protect Against Measles
For those who received the older vaccine, the good news is that a simple booster shot can provide the protection you need. This updated vaccine, which uses the live virus, will enhance your immunity and help you stay safe amid rising cases.
Although the booster isn’t generally recommended for everyone, it is highly suggested for people who live or work in high-risk environments, such as schools or healthcare settings, where exposure to the virus is more likely.
Should You Get the Booster? Here’s How to Find Out
The big question is: How do you know if you're eligible for a booster? Dr. Kaufman West advises that the first step is to check your vaccination records. If you were vaccinated before 1967, the label on your vaccine record may indicate if you received the “killed” virus version of the MMR vaccine. If it does, it’s time to speak to your doctor about getting a booster shot.
While adults aren’t typically encouraged to take a booster unless they’re in high-risk environments, it’s always a good idea to err on the side of caution and contact your primary care physician for guidance.
What Happens If You Skip the Booster?
The growing number of measles cases should not be taken lightly. If you fall into the high-risk category and haven’t received an updated vaccine, you are putting yourself at risk for contracting a disease that can have severe consequences. Measles is highly contagious and can lead to serious complications, particularly for those who are unvaccinated or inadequately protected.
The Bottom Line: Don’t Wait for the Next Outbreak to Act
The rise in measles cases is a stark reminder that vaccines, though incredibly effective, can lose their power over time. If you were born before 1967, now is the time to check your vaccination status and consider a booster shot. It’s a simple step that could save your health—and prevent the spread of a preventable disease.
As the saying goes, "An ounce of prevention is worth a pound of cure." So, don’t wait for the next outbreak. Talk to your doctor, verify your vaccination status, and ensure you're fully protected against measles.
Conclusion: The Measles Comeback Isn’t Just a Fluke
While modern vaccines have worked wonders in reducing the spread of diseases like measles, lapses in immunity—especially for those vaccinated before 1967—could result in a resurgence of outbreaks. If you’re among the older generation, it’s time to take action and protect yourself, especially as measles cases continue to climb. A simple booster could be all that stands between you and this potentially serious disease.