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Narrated by: Grant's Voice

Unabridged — 17 minutes

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Overview

The World Health Organization published a target product profile for covid-19 vaccines that specified minimum characteristics to guide developers-including 50% efficacy.1 These are only aspirational, however, and neither companies nor regulators are bound to follow them. Officials from both the US Food and Drug Administration (FDA) and the European Medicines Agency have already signalled that they would consider approving vaccines that only diminished severity of illness, rather than protec...