'Mix and match' UK Covid vaccine trial expanded
BBC·2021-04-14 09:00
image copyrightGetty Images
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.
……UK Health
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