How human challenge works: At a time when the whole world is focused on protecting itself from the novel coronavirus SARS-CoV-2, more than 20,000 people from 102 countries have enrolled on a US website to voluntarily infect themselves with the virus. It is the “human challenge” in the quest for a vaccine against the novel coronavirus disease Covid-19 — the objective is to go on to test whether a given vaccine works on any of these infected persons. Read more here.
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