4 min read.Updated: 14 Apr 2022, 05:57 AM ISTFaye Flam, Bloomberg
It’s now clear that some folks simply have better natural immunity
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One of the more astonishing things that scientists learned from deliberately exposing volunteers to Covid-19 was that nearly half of them never got infected — even when the virus was introduced directly into their noses. More surprising still, these were people who hadn’t been previously infected or vaccinated. This so-called challenge trial was originally conceived as a way to speed up vaccine testing, but ended up as a window into the dynamics of the virus.
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