HEPA filters are designed to filter the air by trapping 99.9% of airborne particles, such as dust, pollen, and tobacco smoke. HEPA stands for High Efficiency Particulate Air (filter).
A clean, white HEPA filter is displayed horizontally on a bright yellow background. Used in air conditioners, vacuum cleaners, and air purifying machines, HEPA filters ensure that the air is clean by removing bacteria and impurities.
Air conditioning units that recirculate the same air in a room need to be either turned off or used with the windows open in order to stop airborne transmission of COVID-19, British experts say.
Daily Mail. Sun, 12 Jul 2020 03:37:02 GMT.
Fauci on Thursday had said it was a "reasonable assumption" that airborne transmission was occurring even though there was not a lot of solid evidence behind it. ...
Yahoo. Fri, 10 Jul 2020 11:03:11 -0400.
The agency also explained more directly that people without symptoms may spread the virus. The acknowledgments should have come sooner, some experts said.
Apoorva Mandavilli. New York Times. Fri, 10 Jul 2020 00:47:27 +0000.