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COVID-19: WHY WE SHOULD ALL WEAR MASKS
The official recommendation in the United States (and other Western countries) that the public should not wear face masks was motivated by the need to save respirator masks for health care workers. There is no scientific support for the statement that masks worn by non-professionals are “not effective”. In contrary, in view of the stated goal to “flatten the curve”, any additional, however partial reduction of transmission would be welcome — even that afforded by the simple surgical masks or home-made (DIY) masks (which would not exacerbate the supply problem).
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Since the CDC provides no scientific evidence for its statement that masks worn by the public “are not effective”, here we review the scientific support for protection conferred by surgical masks. We focus on mechanistic rationale (as opposed to epidemiological-phenomenological evidence). We conclude, by considering cough droplet ballistics and the latest research findings on the biology of transmission of the SARS-CoV2 virus (which causes COVID-19) that any physical barrier, as provided even by make-shift masks, may substantially reduce the spread of COVID 19. If we are soon to yield to the pressure to loosen lockdowns and allow limited social interactions to revive the economy, then public masks should have a role and could facilitate a middle-of-the-road approach.
The official recommendation by CDC, FDA and others that masks worn by the non-health-care professionals are ineffective is incorrect at three levels: In the logic, in the mechanics of transmission, and in the biology of viral entry.
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Looking forward: if we are soon loosening the lockdown due to the political pressure to sustain the economy, perhaps encouraging face masks to be worn in the public would be a good compromise between total lockdown and total freedom that risks resurgence of the invisible enemy. There is now a robust scientific basis for putting an end to the officials’ anti-surgical mask hysteria and to recommend or even mandate a broad use of masks as in Asian countries that have bent the curve.
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Much more: https://medium.com/@Cancerwarrior/c...here-is-new-scientific-rationale-280e08ceee71