BY WILL JONES 5 SEPTEMBER 2023 READ
Asymptomatic people with Covid are only responsible for a tiny fraction of spread, a study in the Lancet has found, exploding a myth that formed a key part of social distancing policies and fear messaging during the pandemic.
The study, from a team at Imperial College London, is the latest to come out of the human challenge trial, in which 36 people were deliberately infected with SARS-CoV-2 and followed up.
Earlier results from the trial published last year made the surprising finding that only around half (53%) of those who were inoculated with a droplet of infected material in their nose – none of whom had known prior infections or antibodies – went on to test positive for the virus, indicating an unexpected level of immune resistance to the virus.
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