WASHINGTON — By now we've all heard that the Pfizer COVID-19 vaccine has an efficacy rate of 95%, Moderna of 94%, and Johnson & Johnson about 66%; what you may not have known is that rate's technical ...
O’Brien et al. report that the combination of casirivimab and imdevimab (REGEN-COV) reduced the risk of symptomatic Covid-19 by 81.4% among persons exposed to SARS-CoV-2. 1 However, we question the ...
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