Global drug maker Johnson & Johnson (JNJ) announced that its COVID-19 vaccine (Ad26.COV2.S) showed 85% efficacy against Omicron-related hospitalizations in a study conducted by the South African Medical Research Council (SAMRC) on healthcare workers in South Africa. Real-World Study Results The SAMRC conducted a study among healthcare workers in South Africa from mid-November to mid-December, when the Omicron variant became dominant in the country. During the period, Omicron-related cases rose from 82% to 98% of COVID-19 cases in South Africa, as published by GISAID (Global initiative on sharing all influenza data).
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