U.K. Preparing COVID-19 Vaccine Trials That Deliberately Expose Study Subjects

The study is still awaiting final regulatory approval. If given the green light, a study in which human volunteers will be infected with the coronavirus will begin in January at a biosecure unit at London

Proponents say that such controversial “human challenge” studies can speed up vaccine development. But others cite ethical concerns.

(Image credit: Kirsty O’Connor/PA Images via Getty Images)

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