The first U.S. measles-related death in a decade was reported last week, raising concerns about the virus, especially given how contagious it is.
According to the CDC, the best way to prevent infection is through vaccination.
Measles spreads easily—up to 90% of unvaccinated people who come into close contact with an infected person will catch the virus.
As of February 27, 2025, there have been 164 reported cases of measles in the U.S., with three outbreaks (defined as three or more related cases).
One of the biggest challenges with measles is that an infected person can spread the virus for four days before symptoms appear—most notably, the telltale rash—and for four days after. Anyone who isn’t vaccinated is at risk, regardless of age. But should older adults be concerned?
Older Adults And Vaccinations
If you were born before 1957, you’ve likely already had measles and developed natural immunity. Nearly everyone born before 1957 was infected with measles during their childhood. In that case, you don’t need a vaccine.
If you were born after 1957 and received one or two doses of the measles vaccine, you’re generally considered protected
One dose is about 93% effective, while two doses provide around 97% protection.
However, if you only had one dose, your healthcare provider may recommend a second dose if you:
Plan to travel to a place with measles outbreaks
Work or live with someone who is immunocompromised
Live in a community experiencing a measles outbreak
Work in healthcare
If you’re unsure of your vaccination status, check your records.
If you can’t find them, getting another dose of the measles-mumps-rubella (MMR) vaccine is safe—even if you may already be immune.
There is no harm in getting an extra dose.
Another option is a blood test to check your immunity, which is especially useful if you plan to travel.
A Small Group May Need to Be Revaccinated
Between 1963 and 1967, less than a million people received an earlier version of the measles vaccine that is no longer in use. If you were vaccinated during that period and don’t have records confirming which version you received, consult a healthcare provider about getting the current MMR vaccine.
Can You Still Get Measles If Vaccinated?
While the vaccine is highly effective, about 3 in 100 people who receive both doses may still contract measles if exposed.
The reason isn’t fully understood—it could be due to an individual’s immune response.
However, fully vaccinated individuals who do get measles typically experience milder symptoms and are less likely to spread the virus, helping protect those who can’t be vaccinated.
Final Thoughts
Older adults who have already had measles or received two doses of the vaccine are generally protected. However, those with uncertain vaccination records or who were vaccinated between 1963-1967 should consider speaking with their doctor.
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