A trial to confirm if Covid vaccine types can be mixed is underway - what we know so far
Volunteers are being recruited to take part in a world first study to examine the effects of mixing and matching Covid-19 vaccines.
The trial will be conducted on more than 800 participants over the age of 50, and will compare the effects of issuing one dose of the Oxford/AstraZeneca vaccine and one dose of the Pfizer/BioNTech vaccine.
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