How do vaccines affect immunity? fact sheet

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Publication date: 
19 December 2017
Last updated: 
2 October 2020
Publication type: 
Fact sheet
Intended audience: 
General public

This fact sheet is about how vaccines affect immunity.

It provides information about:

  • how vaccines work
  • whether vaccines can overwhelm immune systems of a baby
  • why babies need vaccines
  • why developing natural immunity is not safe.