2) The paper also calls out WHO and CDC for “largely ignoring” the importance of airborne transmission. And also blames the lack of face mask as key factor for poor trends in many countries.pic.twitter.com/m8oHC7VqXx
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2) The paper also calls out WHO and CDC for “largely ignoring” the importance of airborne transmission. And also blames the lack of face mask as key factor for poor trends in many countries.pic.twitter.com/m8oHC7VqXx
3) “wearing of face masks in public corresponds to most effective means to prevent interhuman transmission, and this inexpensive practice, in conjunction w/ social distancing, quarantine, and contact tracing, represents the most likely fighting opportunity to stop the pandemic”
4) “Fig. 3. Contrasting the trends of new infections between NYC and the United States. Daily new confirmed infections in (A) NYC and (B) the United States (minus NYC). The vertical lines label the dates for social distancing, stay-at-home orders, and mandated face-covering.”pic.twitter.com/9p3mmOZfJO
5) “Fig. 4. Transmission of COVID-19. Human atomization of viruses arises from coughing or sneezing, producing virus droplets (>5 μm) and aerosols (<5 μm). Virus transmission from person to person occurs through direct/indirect contact and airborne aerosol/droplet routes...”pic.twitter.com/Nj2YI4X8l2
6) “Large droplets mainly settle out of air to cause contamination, while aerosols are efficiently dispersed in air. Direct & airborne transmissions occur in short range and extended distance/time, respectively. Inhaled airborne viruses deposit directly into respiration tract.”
7) “Fig. 5. Mitigation paradigm. Scenarios transmission under distancing/quarantine/isolation measure only (path a), measures with distancing/quarantine/isolation followed by face covering (path b), and measures w/ simul face covering and distancing/quarantine/isolation (path c).pic.twitter.com/4IBgKeC5Gu
8) “The short-dashed arrows label possible remnants of virus transmission due to circumstances when the measure is not possible or disobeyed and/or imperfection of the measure.”
9) Longer discussion thread by another respiratory researcher on this study: https://twitter.com/don_milton/status/1271251393433780225?s=21 …https://twitter.com/Don_Milton/status/1271251393433780225 …
10) A detractor of the PNAS study. He has some valid points the methods are weaker than initially thought. He still supports masks for all. https://twitter.com/jeremyfaust/status/1271572189490397184?s=21 …https://twitter.com/jeremyfaust/status/1271572189490397184 …
11) Before anyone says this study’s conclusions are wrong about masks, there is ANOTHER arguably much better study on masks today. Much richer data: https://twitter.com/drericding/status/1271618249042558978?s=21 …https://twitter.com/DrEricDing/status/1271618249042558978 …
From the newest mask study, it clearly shows the dramatic effect of mask wearing on reducing the R down to 1 (green) or below (below).pic.twitter.com/MAdUbFwgwy
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