What should you know about measles and mumps vaccine?

It is commonly given as part of the combined measles, mumps and rubella (MMR) vaccine. Vaccination supports personal protection and reduces the opportunity for these viruses to spread to people who are more vulnerable.

The vaccine presents the immune system with a safe way to learn about the viruses. If a vaccinated person later encounters measles or mumps, immune memory can respond more quickly. Protection is not the same as treating an infection that is already underway.

Mild soreness, redness or swelling where the injection was given can occur. Some people develop a short-lived fever or feel generally unwell as the immune response develops. A rash can also occur after MMR vaccination; describe any symptoms to a healthcare professional if you are concerned.

The recommended timing depends on age, previous doses, health history and local vaccination guidance. A clinician can check the record and explain whether a catch-up dose or another formulation is appropriate.

Bring any available vaccination record and tell the clinician about previous vaccine reactions, immune-system conditions, regular medicines, pregnancy or the possibility of pregnancy. Mention a current fever or recent significant illness so the appointment can be assessed safely.

After the injection, remain where the vaccination team can observe you for the period they recommend. Keep fluids nearby, rest if you feel tired, and use only symptom relief advised for you by a pharmacist or clinician. Do not arrange an additional dose without checking the record first.

If you have been exposed to measles or develop a fever and rash, limit close contact with others and contact a healthcare service before attending in person. This allows the service to reduce exposure to people in the waiting area.

Seek urgent medical help for trouble breathing, swelling of the face or throat, fainting, marked drowsiness, a seizure, or a rapidly worsening allergic-looking reaction after vaccination.

Contact a clinician promptly if a child or adult has a high or persistent fever, a spreading rash, severe headache, unusual confusion, or swollen glands with significant illness. These symptoms can have causes other than a vaccine reaction and may need assessment.

For information about measles symptoms and possible exposure, see [Measles](/conditions/measles/), [Fever](/symptoms/fever/), and [Swollen Glands](/symptoms/swollen-glands/). Call ahead before visiting if measles is possible.

Ask which vaccine is recommended, how your previous doses affect the plan, and what side effects should prompt a call. You can also ask whether a current medicine, immune condition, pregnancy or recent illness changes the timing.

If your record is incomplete, ask how it can be checked and whether a [GP Consultation](/treatments/consultations-and-assessment/gp-consultation/) would help. More detail about the combined option is available under [MMR Vaccination](/treatments/preventive-care-and-vaccination/mmr-vaccination/).