What’s the difference between Covid vaccines?

The three Covid-19 vaccines that have been approved in the UK are from Pfizer-BioNTech, the University of Oxford and Astra-Zeneca and Moderna.

These vaccins are similar in some ways but there are many differences between them.

Here is a video from BBC health correspondent Laura Foster that looks at how much immunity they give, how they prevent infection and if any are better than the other…

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