Mixed AstraZeneca-Pfizer Shot Boosts COVID Antibody Level: Study

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A mixed vaccination of first AstraZeneca and then a Pfizer COVID-19 shot boosted neutralizing antibody levels by six times compared with two AstraZeneca doses, a study from South Korea showed. The study involved 499 medical workers – 100 receiving mixed doses, 200 taking two…

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Source: NewsMax

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