FatCool schreef op 3 augustus 2020 20:01:
6 Tips To Make It Harder For Coronavirus To Spread Around IndoorsBy Andrea Dukakis - August 3, 2020
Early on in the coronavirus pandemic, groups like the World Health Organization and the Centers for Disease Control and Prevention issued guidance intended to protect people from certain kinds of transmission: respiratory droplets spread when an infected person sneezes or coughs near you and through surfaces contaminated with the droplets.
Now, at the urging of scientists like Jose-Luis Jimenez, a chemistry professor at the University of Colorado Boulder who’s studied aerosols for two decades, those organizations have added another critical piece to the puzzle: the spread of airborne particles — also called aerosols — that linger in the air.
That also explains a lot about why indoor transmission is significantly higher than outdoor transmission, and why in recent months, public health officials have turned their focus to having people take precautions like masks indoors. Outside, those same particles are dispersed by wind and the virus is killed off by ultraviolet rays.
The scientists attribute aerosols to super-spreader events — like one in Guangzhou, China — where diners in a restaurant were infected with the virus even though they remained more than six feet away from someone carrying it.
Jimenez was one of more than 200 researchers who signed an open letter earlier this summer urging the WHO to add aerosols to the list of ways the virus is transmitted, which the WHO has since done. It’s a sign of how quickly people’s understanding of the virus is evolving.
www.cpr.org/2020/08/03/6-tips-to-make...