Report downgrades long range transmission of SARS-CoV-2, but recommends masks anyway

A report by Michael Klompas, MD, MPH, Meghan A. Baker, MD, ScD and Chanu Rhee, MD, MPH looking into studies of airborne transmission of SARS-CoV-2 concludes that although there are rarely absolutes in biological systems, the current evidence indicates that “long-range aerosol-based transmission is not the dominant mode of SARS-CoV-2 transmission.

“All told, current understanding about SARS-CoV-2 transmission is still limited. There are no perfect experimental data proving or disproving droplet vs aerosol-based transmission of SARS-CoV-2. The balance of evidence, however, seems inconsistent with aerosol-based transmission of SARS-CoV-2 particularly in well-ventilated spaces.

What this means in practice is that keeping 6-feet apart from other people and wearing medical masks, high-quality cloth masks, or face shields when it is not possible to be 6-feet apart (for both source control and respiratory protection) should be adequate to minimize the spread of SARS-CoV-2 (in addition to frequent hand hygiene, environmental cleaning, and optimizing indoor ventilation).”

Source: Airborne Transmission of SARS-CoV-2

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