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What do I do about immunisation reactions?

Answered by Dawn Kelly
8th September 2015
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Most likely, your baby will only be upset by the injection itself and just need a cuddle.

Some babies get redness and swelling at the injection site, become irritable, or get a fever. These symptoms usually go away after a few days and don’t require any treatment.

For a fever, you can help your baby feel better by making sure they don’t have too many layers on and are staying hydrated. If they are distressed you can also give them some infant paracetamol or ibuprofen to help lower their temperature. Age ranges for these products vary, so always check the label.  Never give a child medication, such as paracetamol, as a preventative measure for post-immunisation fever.

Call your doctor if your child:

  • Has a seizure (this happens in only 1 out of every 1000 immunised children)
  • Your child is under 3 months old and has a temperature of 38°C degrees or more.
  • Your child is under 6 months old and has a temperature of 39°C degrees or more. 
  • Develops small bruise-like rashes in the six weeks after the measles/mumps/rubella (MMR) vaccination

If you have any concerns about your child’s reaction to immunisations, speak with your doctor.

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