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Vaccine Efficacy

A report published as a preprint in medRxiv May 21st by Shapiro and others helps to evaluate this issue.  The authors used data from publication, reports, and press releases and concluded that the average efficacy of the Pfizer, Moderna, Johnson & Johnson,...

Can One Have COVID-19 But Be Antigen and PCR Negative?

An interesting correspondence by Lekpa and others published in The Lancet Infectious Diseases May 28th 2021 suggests that this is indeed the case.   They feel that the clinical case and context for the suspicion of COVID-19 needs to be brought into the...
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