Chinese scientists say they have discovered an unexpected pathway to infection from Covid-19 – with more than 80 per cent of the tiny floating particles of virus on the breath landing on the back and buttocks of a passer-by.But Weng Wenguo and his colleagues at Tsinghua University’s engineering physics department suggest the virus can also approach from behind, by riding on the wake of turbulence produced by the body’s movements.
Laboratory experiments and computer simulations showed the turbulence rose to its maximum soon after passing the seated patient, moving the particles at twice the speed of the walking pace. But most importantly, people should reduce their activities, the paper said. “It is recommended reducing cross-section movement in infected areas.” Weng’s team could not immediately be reached for comment.
“It’s the reason for the dust that builds up over the rear window on a car running off-road,” said the scientist, who asked not to be named because of the sensitivity around the pandemic issue. Researchers use dummies in a lab experiment to determine if coronavirus particles can spread from a seated person to a passer-by
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