Traditionally, kids get vaccines to protect them against mumps when they are 12 to 15 months old (1st dose of MMR) and again before starting kindergarten (2nd dose of MMR).
Do Your Kids Need a Mumps Booster Shot?
Routine use of the mumps vaccine, which was first licensed in 1967, has helped to greatly reduce the incidence of mumps cases from pre-vaccine era levels.
Outbreaks of mumps the last few years have led to calls for a third dose of MMR in some situations though.

Does that mean that your kids will need a third dose of the MMR vaccine?
Probably not.
“Persons previously vaccinated with 2 doses of a mumps virus–containing vaccine who are identified by public health authorities as being part of a group or population at increased risk for acquiring mumps because of an outbreak should receive a third dose of a mumps virus–containing vaccine to improve protection against mumps disease and related complications.”
Recommendation of the Advisory Committee on Immunization Practices for Use of a Third Dose of Mumps Virus–Containing Vaccine in Persons at Increased Risk for Mumps During an Outbreak
Is there a mumps outbreak in your area?
While that is the main reason to get a third dose of MMR, simply being near an outbreak still doesn’t mean an extra vaccine is necessary.
“In the setting of an identified mumps outbreak, public health authorities should define target groups at increased risk for mumps during the outbreak, determine whether vaccination of at-risk persons is indicated, and provide recommendations for vaccination to health care providers.”
Recommendation of the Advisory Committee on Immunization Practices for Use of a Third Dose of Mumps Virus–Containing Vaccine in Persons at Increased Risk for Mumps During an Outbreak
Your local or state health department will decide which folks need a third dose of MMR in an outbreak situation.
“Persons at increased risk for acquiring mumps are those who are more likely to have prolonged or intense exposure to droplets or saliva from a person infected with mumps, such as through close contact or sharing of drinks or utensils.”
Recommendation of the Advisory Committee on Immunization Practices for Use of a Third Dose of Mumps Virus–Containing Vaccine in Persons at Increased Risk for Mumps During an Outbreak
Why not just give everyone a third dose of MMR?
The issue with the mumps vaccine is waning immunity, so it isn’t known how long an extra dose would last, and that’s why at this time, the only recommendation is to give an extra dose during outbreaks.
If you are still unsure about needing a third dose of MMR, ask your pediatrician, school health clinic, or local health department, especially if you have heard about local mumps cases.
What to Know About the Mumps Booster Shot
A third dose of MMR is recommended for some people at high risk to get mumps in an outbreak situation.
More on the Mumps Booster Shot
- CDC – Recommendations of the Advisory Committee on Immunization Practices for Use of a Third Dose of Mumps Virus-Containing Vaccine in Persons at Increased Risk for Mumps During an Outbreak (ACIP)
- Study – Impact of a third dose of measles-mumps-rubella vaccine on a mumps outbreak
- Ask the Experts about MMR
- CDC – Mumps Cases and Outbreaks
- Why Do So Many Vaccinated People Get the Mumps During an Outbreak?
- Mumps: Why Bother Caring?
- Mumps vaccine effectiveness and waning immunity