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September 01, 2020



Deployment of a weakly effective vaccine could
actually worsen the COVID-19 pandemic if authorities wrongly assume it
causes a substantial reduction in risk, or if vaccinated individuals
wrongly believe they are immune, hence reducing implementation of, or
compliance with, other COVID-19 control measures.


ref: Krause P, Fleming TR, Longini I, Henao-Restrepo AM, Peto R; World
Health Organization Solidarity Vaccines Trial Expert Group. COVID-19
vaccine trials should seek worthwhile efficacy [published online ahead
of print, 2020 Aug 27]. Lancet. 2020; S0140-6736(20)31821-3.

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