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This article was published on March 16, 2021, at NEJM.org.DOI: 10.1056/NEJMoa2102214 This clinical trial led by the South African Medical Research Council found that the AstraZeneca jab was ineffective at preventing mild-to-moderate infections with the B1351 variant first found in South Africa

Astra Zeneca,  South Africa,  variant,  SARS-CoV-2,  COVID-19,  Immunization,  B1351,