Introduction
coronavirus disease 2019
DISEASE, CORONAVIRUS DISEASE 2019
Vaccination has drastically reduced the global mortality and morbidity burden of coronavirus disease 2019 (COVID-19) (AZD1222 (ChAdOx1 nCoV-19) is a simian, replication-deficient, adenovirus-vectored COVID-19 vaccine that has demonstrated safety and efficacy in preventing symptomatic disease (Prevention of COVID-19 in adults by AZD1222 primary vaccination was studied in a large, diverse population from US, Chile, and Peru in a 2:1 randomized, placebo-controlled, phase 3 study (NCT04516746) (