Yes, you can still get measles if you’re vaccinated, but it’s uncommon and usually much milder than in people who aren’t vaccinated.

How often does this actually happen?

Health agencies estimate that:

  • About 3 out of 100 people who got 2 doses of a measles vaccine could still get measles if they are exposed.
  • About 7 out of 100 people who had only 1 dose might get measles if exposed.

So the vaccine is very effective, but not perfect. Two doses of MMR prevent measles in roughly 97–99% of people.

Why can measles happen after vaccination?

A few main reasons:

  • Weaker immune response: Some people’s immune systems just don’t respond strongly to the vaccine, even when it’s given correctly.
  • Very intense exposure: Being around multiple unvaccinated, infectious people (for example, in a household or classroom during an outbreak) can overwhelm protection, even in someone who previously responded to the vaccine.
  • Only one dose or incomplete records: People who got only one dose, or aren’t sure if they got the full series, have a higher risk than those with two documented doses.

If you get measles after vaccination, is it as bad?

Typically, no. When fully vaccinated people do get measles:

  • Illness is usually milder (fewer days of fever, less severe rash, fewer complications).
  • They are less likely to spread it to others compared with unvaccinated cases.

This is sometimes called “breakthrough measles” and tends not to come with the same high risk of pneumonia, brain swelling, or hospitalization seen more often in unvaccinated people.

Can you catch measles from the vaccine itself?

For people with a normal immune system, the answer is no.

  • The MMR vaccine uses a weakened (attenuated) virus that can stimulate immunity but is not the same as wild measles infection.
  • It is not spread from person to person and does not cause the typical severe measles disease.

People with severely weakened immune systems are usually advised not to get live vaccines like MMR, and should follow specialist medical advice.

What this means for you right now

If you’re vaccinated and hear about measles in the news or on forums, a few practical points:

  • Two documented MMR doses mean you are very well protected , and your risk of severe measles is low.
  • If you were exposed to a known measles case (same room, same flight, etc.), you should still call a healthcare provider or public health line ; they may recommend testing, isolation, or, in some cases, an extra dose depending on your situation.
  • If you’re unsure of your vaccination status, many adults can safely get MMR again; your doctor can check your records, order a blood test for immunity, or simply revaccinate.

Bottom line: vaccination doesn’t give a 100% guarantee, but it massively lowers your chance of getting measles and makes any breakthrough case milder and less contagious.

Note: This is general information, not personal medical advice. If you think you were exposed, have a rash and fever, or live with someone who is pregnant, very young, or immunocompromised, contact a healthcare professional or local health department promptly.

Information gathered from public forums or data available on the internet and portrayed here.