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3-in-1 teenage booster side effects

Side effects of the 3-in-1 teenage booster vaccine are usually mild, shortlived and happen within 2 or 3 days of receiving the jab. Not everyone will get side effects.

Very common reactions to the teenage 3-in-1 booster

More than 1 child in 10 will have:

  • pain, tenderness or redness at the injection site
  • swelling or a small painless lump at the injection site

Common reactions to the teenage 3-in-1 booster

Between 1 child in 10 and 1 child in 100 will:

  • feel dizzy
  • feel or be sick (nausea and vomiting)
  • have a high temperature
  • get a headache

Uncommon reactions to the teenage 3-in-1 booster

Between 1 child in 100 and 1 child in 1,000 will:

Rare or very rare reactions to the teenage 3-in-1 booster

Fewer than 1 child in 1,000 will have:

  • joint pains

Other side effects

Other side effects that have been reported include:

Allergic reactions

Very rarely a child may have a more severe allergic reaction, known as anaphylaxis.

The healthcare professional giving the vaccine will be fully trained in how to deal with severe allergic reactions and children recover completely with treatment.

Treating 3-in-1 booster side effects

If you feel unwell after the immunisation, take paracetamol or ibuprofen. If your temperature is still high after the second dose of painkillers, speak to a GP or call the free NHS 111 helpline.

If you are under 16, do not take medicines that contain aspirin.

Monitoring vaccine safety

In the UK the Yellow Card Scheme allows doctors, other healthcare professionals, and you to report suspected side effects from any medicine you are taking, including vaccines.

It is run by the Medicines and Healthcare products Regulatory Agency (MHRA). The MHRA regularly reviews the yellow card reports. If it feels there is a potential problem, it will carry out an investigation and, if necessary, take appropriate action.

Most reactions reported through the Yellow Card Scheme have been minor reactions such as rashes, fever, vomiting, and redness and swelling where the injection was given.

There is also a legal requirement for pharmaceutical companies to report serious and suspected adverse events to the MHRA.

Find out how to report a vaccine side effect

Page last reviewed: 8 December 2020
Next review due: 8 December 2023