Placebos aren't needed for challenge trials of Covid-19 vaccines - STAT

Placebos aren't needed for challenge trials of Covid-19 vaccines - STAT

Placebo arms aren’t needed for challenge trials of Covid-19 vaccines

By KENT A. PEACOCK AND JOHN R. VOKEY

ADOBE

The use of placebos in challenge trials for a Covid-19 vaccine is both pointless and ethically questionable, exposing volunteers to unnecessary harm.

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