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Why do you need more than one dose of some vaccines?

Posted by: Blog Editor, Posted on: 20 July 2026 - Categories: immunisations
Healthcare worker in blue medical uniform administers a meningitis vaccination to a seated student at a temporary vaccination clinic on a university campus. Medical supplies and sharps containers are visible on tables, with additional healthcare staff and students in the background. The vaccination session took place at Canterbury University in Kent, UK, on 20 March 2026, following a recent meningitis outbreak

Many vaccines need more than one dose to provide protection. This blog post explains why multiple doses are sometimes needed, how vaccine schedules are determined, and what the evidence says about staying protected.

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Protecting our children – MenB vaccine

Posted by: Viv Bennett, Posted on: 24 August 2015 - Categories: Health Protection, Immunisation and vaccination

We all want the best start for our children. Protecting babies and infants from illness and disease is crucial and a key priority for PHE. Immunisations are quick, safe and effective. In England we have added to the immunisation schedule …

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The official blog of the UK Health Security Agency, providing expert insight on the organisation's work and all aspects of health security.

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  • Why do you need more than one dose of some vaccines? 20 July 2026

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