'Mix and match' UK Covid vaccine trial expanded

'Mix and match' UK Covid vaccine trial expanded

BBC·2021-04-14 09:00

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image captionOver-50s who have had a dose of the Pfizer or AstraZeneca vaccine can take part in a study on mixing jabs

A major UK trial looking at whether Covid vaccines can be mixed with different types of jabs used for first and second doses is being expanded.

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UK Health