Prognosis

Infecting Subjects May Speed Covid Vaccine Studies, WHO Says

‘Challenge studies’ may cut time needed to test inoculations
Exposure to virus would pose potential risks to volunteers

Seeing ‘Glimmers of Hope’ on Coronavirus: Johns Hopkins’ Farley

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By Corinne Gretler and John Lauerman

May 6, 2020 at 8:30 PM UTC

Updated on

May 7, 2020 at 7:51 AM UTC

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Deliberately infecting healthy volunteers with the virus that causes Covid-19 may speed studies of vaccines against the deadly pathogen, the World Health Organization said.