Mixing Covid vaccines gives good protection, study suggests
Any combination of Pfizer or AstraZeneca for first and second doses works, a study suggests.
from BBC News - World https://ift.tt/3gYmhNt
https://ift.tt/3gYmhNt
from BBC News - World https://ift.tt/3gYmhNt
https://ift.tt/3gYmhNt
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