26/05/2026
‼️please read and share
“Vaccines don’t just protect one child — they protect the whole community.” ❤️
Adults can still get measles even if they were vaccinated, but it’s much less common and usually happens for a few reasons:
1. No vaccine is 100% effective
The measles vaccine is very effective, but not perfect.
1 dose protects about 93% of people
2 doses protect about 97% of people
That means a small number of vaccinated people can still get infected, especially if they are exposed during an outbreak. Measles
2. Some adults only got one dose
Many older adults received only one measles vaccine when they were children, depending on the country and year they were born. One dose gives good protection, but two doses are stronger and longer-lasting.
3. Vaccine records or immunity uncertainty
Some adults think they were vaccinated but:
never actually completed the vaccine schedule,
had incomplete childhood records,
or received vaccines during periods when storage or delivery problems affected effectiveness (rare, but possible).
4. Weakened immune system
In some people, immunity may not work as strongly due to medical conditions or treatments that suppress the immune system.
5. High exposure during outbreaks
If measles spreads in a community with low vaccination rates, even vaccinated people can occasionally get infected because the virus is extremely contagious. However, vaccinated people often get a milder illness and are less likely to develop severe complications.
What illness was almost wiped out?
Smallpox is the major disease that was completely eradicated worldwide through vaccination — no natural cases since 1980.
Measles, however, was not eradicated. In many places it became very rare because of vaccination, but outbreaks can return when community vaccination drops (this is related to “herd immunity,” where enough people are protected to slow spread)