Uploaded January 2021 | Updated September 2026, 1 day ago

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Dr. Kevin Brown is a consultant medical virologist working at Public Health England.. His area of expertise is in vaccine-preventable viral infections and he has been a virologist for more than 30 years.

This is one of a series of 52 explainer videos for the COVID-19 vaccination programme. This short video explains how the Oxford AstraZeneca vaccine works and how it uses an adenovirus with its genetic code removed..

You can read more about the COVID-19 vaccine here: gov.uk/government/publications/covid-19-vaccination-guide-for-older-adults
and visit: nhs.uk/conditions/coronavirus-covid-19/coronavirus-vaccination