Mixed AstraZeneca-Pfizer shot boosts COVID antibody level - study
Mixed AstraZeneca-Pfizer shot boosts COVID antibody level - study The study involved 499 medical workers - 100 receiving mixed doses, 200 taking two doses of the Pfizer/BioNTech shot and the remainder getting two AstraZeneca shots. https://ift.tt/eA8V8J
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