How — and When — We’ll Know If a Covid-19 Vaccine Is Working

Phase 3 trials explained

Photo: ANDREW CABALLERO-REYNOLDS / Getty Images

There are more than 150 experimental Covid-19 vaccines in development right now, and a handful of those have recently entered the final stages of human testing.

Initial findings show a glimmer of promise: In early trials, these vaccines appear safe and seem to spur an immune response in the…

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A blog from Medium for Covid-19 news, advice, and commentary.

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Emily Mullin

Emily Mullin

Former staff writer at Medium, where I covered biotech, genetics, and Covid-19 for OneZero, Future Human, Elemental, and the Coronavirus Blog.

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