MIT Technology Review: What researchers learned from deliberately giving people covid

MIT Technology Review: What researchers learned from deliberately giving people covid. “The 36 volunteers, all aged 18 to 30, were exposed to a low dose of the original SARS-CoV-2 virus in the nose, the equivalent of the amount found in just a single drop of nasal fluid. Half the participants developed covid symptoms; they became infectious within just two days, with levels of infectious virus peaking at five days. It has previously been estimated that the time from exposure to first symptoms was about five days. Participants in the study remained infectious for an average of nine days and still had detectable levels of virus in their nose 12 days after initial exposure.”

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