Human Challenge Trials Could Deliver a Vaccine More Quickly

On May 6, the World Health Organization (WHO) published criteria for an ethically acceptable COVID-19 human challenge trial. By Oct. 20, the U.K. announced the world’s first of such a trial. To study the efficacy of vaccines on an accelerated timeline, the scientists overseeing the study will deliberately infect healthy volunteers with SARS-CoV-2, the virus [...]

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