A good article on masks. One key way they are believed to help is that lowering the dose that is inhaled lowers the severity of the disease. This could partly explain the many asymptomatic (and low symptom) cases. https://twitter.com/yonidoe/status/1344021519605886978
https://twitter.com/dearpandemic/status/1290803792242446337
https://twitter.com/bob_wachter/status/1281786641456205825
Her original paper.. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7393808/
Masks Do More Than Protect Others During COVID-19: Reducing the Inoculum of SARS-CoV-2 to Protect...

Although the benefit of population-level public facial masking to protect others during the COVID-19 pandemic has received a great deal of attention, we discuss for one of the first times the...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7393808/
Our Perspective in May discussing why masks are critical in lowering the spread of SARS-CoV-2...cites Syrian hamster model study and discusses how masks can lower dose which can lower severity of disease if you catch it. https://science.sciencemag.org/content/368/6498/1422.full
Reducing transmission of SARS-CoV-2

Respiratory infections occur through the transmission of virus-containing droplets (>5 to 10 µm) and aerosols (≤5 µm) exhaled from infected individuals during breathing, speaking, coughing, and...

https://science.sciencemag.org/content/368/6498/1422.full
One more....cruise ship with masks vs one without.... https://twitter.com/AliNouriPhD/status/1283925161801121792?s=20
Another great thread on the topic - thanks @AliNouriPhD for all of your excellent posts! https://twitter.com/AliNouriPhD/status/1343997393855983616?s=20
You can follow @kprather88.
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