Introduction 

How the MMR vaccine works

The vaccine triggers the immune system to produce antibodies against measles, mumps and rubella, as though your body had been infected with them. Antibodies are proteins that are produced by the body to neutralise or destroy disease-carrying organisms and toxins.

This also teaches your immune system how to produce the appropriate antibodies quickly.

If you then come into contact with one of the diseases, your immune system will recognise it and immediately produce the antibodies needed to fight it.

MMR is the combined vaccine that protects against the following diseases:

  • measles,
  • mumps, and
  • rubella.

The vaccine was introduced in 1988. Since then, the number of children who catch these diseases has fallen to an all-time low.

The first MMR vaccination is given to children at around 13 months of age. A booster dose is given before they start school (usually between three and five years of age). 

The vaccine contains weakened versions of live measles, mumps and rubella viruses (see box, left). Because the viruses are weakened, people who have recently had the vaccine cannot infect other people.

Measles, mumps and rubella have serious complications, which is why it is important that your child is vaccinated against them (see Why it should be taken, above).

Currently, there are no licensed single vaccines in the UK for either measles or mumps.

  • show glossary terms

Glossary

MMR
MMR stands for measles, mumps and rubella. It is a vaccine that prevents measles, mumps and rubella by making the body produce antibodies to fight off the viruses.
Disease
A disease is an illness or condition that interferes with normal body functions.

Last reviewed: 24/07/2009

Next review due: 24/07/2011

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