https://www.healthline.com/health-news/50-percent-of-people-with-covid19-not-aware-have-virus
The virus that causes COVID-19 may be more infectious than previously known through airborne aerosols, spurring an international group of 239 scientists to call for new warnings from the World Health Organization (WHO).
But, studies do confirm that much more consistent mask usage could dramatically cut infections.
“while staying six feet from other people reduces exposure, it might not be sufficient in all situations, such as in enclosed, poorly ventilated rooms.”
https://www.cbsnews.com/news/coronavirus-asymptomatic-presymptomatic-silent-spreaders/
"Silent spreaders" could be behind half of COVID-19 cases, study finds
With "silent transmission" of the coronavirus possibly accounting for half of all COVID-19 cases, more testing needs to be done, Dr. Ron Elfenbein said on CBSN Monday. The estimate that 50% of cases may be spread by people who aren't showing symptoms is based on a model published by the National Academy of Sciences.
https://www.pnas.org/content/117/30/17513#ref-2
As modern Westernized humans we are arrogant idiots. I know I am for sure.
We don't realize that Mother Nature is in control and so people REFUSE to wear a mask if they can think up any excuse possible.
Our results indicate that silent disease transmission during the presymptomatic and asymptomatic stages are responsible for more than 50% of the overall attack rate in COVID-19 outbreaks. Furthermore, such silent transmission alone can sustain outbreaks even if all symptomatic cases are immediately isolated.
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