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What to know about measles

Measles is a very contagious illness that spreads through the air when an infected person coughs or sneezes. It usually starts with a fever, cough, runny nose, and red eyes, followed by a rash of tiny red spots. While measles might sound like a childhood illness of the past, it can still cause serious health problems for unvaccinated people.

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Measles in 15 seconds

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Why is measles so dangerous?

Measles isn't just a rash. It can lead to serious complications and spread quickly in communities where vaccination rates are low.

  • About 1 in 5 unvaccinated people in the U.S. who get measles will need to be hospitalized.
  • It can cause dehydration, pneumonia, brain swelling, and even death.
  • Measles can also weaken the immune system, making it easier to get other infections.
  • Someone with measles can spread it through the air before they even know they're sick. The virus can linger in the air for hours after an infected person has passed by.
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How do I protect my family?

The best way to prevent measles is by getting the MMR vaccine, which protects against measles, mumps, and rubella. Children should get their first dose at 12-15 months and a second dose at 4-6 years.

The vaccine is safe and effective. One dose is 93 percent effective, and two doses are 97 percent effective. When more people are vaccinated, we protect the babies who are too young for the vaccine and others who are more vulnerable.

Learn more

Find more information about measles and how to keep kids safe.

External link icon Minnesota Department of Health: Measles

Learn more about measles, its symptoms, and what to do if your child is exposed. This page is available in a variety of languages, including Spanish, Somali, and Hmong.

External link icon Mayo Clinic: Measles

This website includes an overview of measles, the factors that put people at risk for an infection, and more.

External link icon HealthyChildren.org: Measles: What Parents Need to Know

This resource from the American Academy of Pediatrics provides info for parents about traveling internationally with young kids and when your child should get vaccinated.