Nickie
28-06-2021, 16:46
Any combination of Pfizer or AstraZeneca for first and second doses works, a study suggests.
More... (https://www.bbc.co.uk/news/health-57636356)
More... (https://www.bbc.co.uk/news/health-57636356)
View Full Version : Mixing Covid vaccines gives good protection, study suggests