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Your Child's Immunizations: Measles, Mumps & Rubella (MMR) Vaccine

The MMR vaccine protects against measles, mumps, and rubella (German measles).

MMR Immunization Schedule

Children get the MMR vaccine by injection in 2 doses:

  1. at age 12–15 months
  2. at age 4–6 years

Children traveling outside the United States can get the vaccine as early as 6 months of age. They still should get the routine doses at 12–15 months and 4–6 years of age. If they're staying in an area where disease risk is high, they should get the first dose at 12 months and the second at least 4 weeks later.

Older children also can get the vaccine if they didn't get it when they were younger. Sometimes doctors give MMR in combination with the chickenpox vaccine in a vaccine called MMRV.

The U.S. has had recent outbreaks of mumps and measles. An outbreak is when a disease happens in greater numbers than expected in a particular area. During an outbreak, doctors may recommend a third vaccine dose for some people. If you have questions about vaccinating your family during an outbreak, call your doctor or your state or local health department.

Why Is MMR Recommended?

Measles, mumps, and rubella are infections that can lead to serious illness. More than 95% of children who get the MMR vaccine will be protected from the three diseases throughout their lives.

Possible Risks of the MMR Vaccine

Serious problems such as allergic reactions are rare. Mild to moderate side effects can happen, such as rash, fever, swollen cheeks, febrile seizures, and mild joint pain.

When to Delay or Avoid MMR Immunization

The MMR vaccine is not recommended if your child:

Talk to your doctor about whether the vaccine is a good idea if your child:

  • is currently sick. But simple colds or other minor illnesses should not prevent immunization.
  • has gotten any other vaccines in the past month, or blood products in the past few months (such as from a transfusion), as some can interfere with how well the MMR vaccine will work
  • has ever had a low platelet count

Your doctor may decide that the benefits of vaccinating your child outweigh the possible risks.

Pregnant women should not get the MMR vaccine until after childbirth.

Caring for Your Child After MMR Immunization

If your child develops a rash without other symptoms, no treatment is needed. The rash should go away in several days. Check with your doctor to see if you can give either acetaminophen or ibuprofen for pain or fever and to find out the appropriate dose.

When Should I Call the Doctor?

Call your doctor if:

  • You aren't sure if the vaccine should be postponed or avoided.
  • There are problems after the immunization.

Reviewed by: Elana Pearl Ben-Joseph, MD
Date Reviewed: Feb 10, 2022

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