"Only a handful of studies have looked for viable virus outside the lab. Tal Brosh-Nissimov, who heads the infectious-diseases unit at the Assuta Ashdod University Hospital in Israel, and his colleagues swabbed personal items and furniture in hospital isolation units and rooms at a quarantine hotel. Half of the samples from two hospitals and more than one-third of samples from the quarantine hotel were positive for viral RNA. But none of the viral material was actually able to infect cells, the researchers reported7.
Indeed, researchers have struggled to isolate viable virus from any environmental samples, not just fomites. In the only study8 that has succeeded, researchers grew virus particles from hospital air samples collected at least 2 metres from a person with COVID-19.
Armed with a year’s worth of data about coronavirus cases, researchers say one fact is clear. It’s people, not surfaces, that should be the main cause for concern. Evidence from superspreading events, where numerous people are infected at once, usually in a crowded indoor space, clearly point to airborne transmission, says Marr. “You have to make up some really convoluted scenarios in order to explain superspreading events with contaminated surfaces,” she says." [1]
The most important thing is to avoid the air exhaled by infected people: to wear good masks, to avoid poorly ventilated rooms, to work from home, not to use public transportation. Surface disinfection has a purely psychological effect - oh, how clean it is here ...
1. Nature 590, 26-28 (2021)
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