Medical Health Cluster

Nationwide

Fourth Dose of BNT162b2 mRNA Covid-19 Vaccine in a Nationwide Setting

Abstract BACKGROUND With large waves of infection driven by the B.1.1.529 (omicron) variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), alongside evidence of waning immunity after the booster dose of coronavirus disease 2019 (Covid-19) vaccine, several countries have begun giving at-risk persons a fourth vaccine dose. METHODS To evaluate […]

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