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Replying to @stewartbrand
As stated earlier, for clinical settings, face shields and masks are preferable. For leisure, everyone wearing masks should be enough. If you are thinking of only wearing a face shield, you might as well wear nothing...
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Replying to @DanielleFong @stewartbrand
Because only wearing a face shield won't protect you from particles going around the face shield. Sometimes a false sense of security is worse than not doing anything at all...
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Replying to @Pravduh15 @stewartbrand
It maybe be a matter of what is the fraction of the particles that are reduced, especially as compared to the N95 mask, which supposedly capture 95%, but it's actually all over the place.
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Replying to @DanielleFong @stewartbrand
Imagine breath forms an aerosolized cloud, like smoke. If you exhale that smoke through fabric and someone else was wearing a fabric mask, would that be preferable to a face shield?
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Remember that the water droplets are the primary means of transmission.
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Yes, I'm saying, I have a lot of experience with the dynamics of water spray in air from my experience in LightSail, and it matters a lot how much (a) viral load theories are true and (b) what the size distribution is of the droplets.
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🤷🏻♀️ Retweeted 🤷🏻♀️
🤷🏻♀️ added,
🤷🏻♀️ @DanielleFongThis paper shows that cloth masks, at least of the kind they used are significantly less effective than N95 masks, and the amount of the penetration of the material depends massively on the size of the droplets https://academic.oup.com/annweh/article/54/7/789/202744 … Any studies on typical COVID19 droplet size?0 replies 0 retweets 1 likeThanks. Twitter will use this to make your timeline better. UndoUndo
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