Measles, mumps and rubella (MMR) vaccine (MMRvaxPro, Priorix)

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MMR vaccine is offered as part of the UK childhood immunisation schedule. It helps to protect your child from measles, mumps and rubella (German measles).

The vaccine will be injected into your child's thigh (younger children) or upper arm (older children).

The most common side-effects are tenderness at the site of the injection, and mild fever. These should soon pass.

Type of medicineMeasles, mumps and rubella vaccine
Used forImmunisation against measles, mumps and rubella
Also calledMMRvaxPro®; Priorix®
Available asIntramuscular injection

MMR stands for measles, mumps and rubella (German measles). These are three different diseases which are caused by three different viruses. The vaccines given to immunise against measles, mumps and rubella are all combined into one injection - the MMR vaccine.

Two doses of the vaccine are given as part of the routine childhood immunisation in UK. The first dose of MMR vaccine is usually given to children aged 12-13 months, and a second dose is given as a pre-school booster.

The vaccine is also offered to older children and adults who have not received the two routine doses during childhood.

The vaccine stimulates your child to make antibodies against the three viruses. These antibodies then help to protect your child from illness.

Before your child is given MMR vaccine, make sure your doctor knows:

  • If your child has been unwell recently or has a high temperature.
  • If your child has previously had an allergic reaction to a vaccine or medicine.
  • If your child has a condition that makes them bleed more than is normal, such as haemophilia.
  • If you have been told your child has a weakened immune system.

If the vaccine is for you (rather than for a child), you must tell your doctor if any of the above apply to you. It is also important that you let your doctor know if you could be pregnant, or if you are breast-feeding.

  • Before your child is given the vaccine, ask to read the manufacturer's printed information leaflet. The manufacturer's leaflet will give you more information about the vaccine and will tell you about any side-effects which your child may experience from having it. If you have any questions about the vaccine, ask your doctor or nurse for advice.
  • Your child will be given two doses of the vaccine. It is usual for the first dose to be given between 12 and 13 months of age, and the second before they start school.
  • In younger children the vaccine is usually given by injection into a muscle in their upper leg. Older children will be given the injection into a muscle in their upper arm. If your child has a condition which makes them bleed more than normal, the vaccine will be given as an injection under their skin rather than into a muscle.
  • If your child has a high temperature or is acutely unwell at the time of a scheduled immunisation, the doctor or nurse may recommend delaying giving the vaccine. A minor illness (such as a cough, cold or snuffles) will not interfere with the vaccine. If a delay is advised, you will be given an alternative appointment for the vaccination to be given.

Along with their useful effects, vaccines like most medicines can cause unwanted side-effects, although not everyone experiences them. MMR immunisation frequently causes no problems, but the table below contains some of the side-effects which may occur. You will find a full list in the manufacturer's information leaflet supplied with the vaccine. Speak with a doctor or nurse if any of the following side-effects continue or become troublesome.

Common MMR vaccine side-effectsWhat can I do if I experience this?
Soreness, swelling, or redness around the site of the injectionThis should soon pass. If you are concerned, speak with your doctor, nurse or health visitor
A mild feverGive one dose of paracetamol, followed by a second dose 4-6 hours later if needed. (Alternatively, one dose of ibuprofen can be given, followed by a second dose 6 hours later.) Check the directions on the label to make sure you give the correct dose for the age of your child
RashThis may occur a week after the injection and last a day or so. If it persists or if it is severe, speak with your doctor
Flu-like symptoms, swollen glands (after 3 weeks)These should soon pass

You will normally be asked by the doctor or nurse to wait several minutes after the immunisation to make sure that there is no adverse reaction to the vaccine. Although allergic reactions are extremely rare, you should seek urgent medical advice if your child becomes breathless, or if any severe swelling or rash develops within a few days of the immunisation.

If you experience any other symptoms which you think may be due to the vaccine, speak with your doctor or pharmacist.

Further reading & references

  • Manufacturer's PIL, Priorix®; GlaxoSmithKline UK, The electronic Medicines Compendium. Dated June 2013.
  • Manufacturer's PIL, MMRvaxPro®; Sanofi Pasteur MSD Limited, The electronic Medicines Compendium. Dated February 2013.
  • British National Formulary; 66th Edition (September 2013) British Medical Association and Royal Pharmaceutical Society of Great Britain, London

Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.

Original Author:
Helen Allen
Current Version:
Peer Reviewer:
Dr Helen Huins
Document ID:
28766 (v1)
Last Checked:
Next Review:
The Information Standard - certified member

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