Did you read the study that showed for most use (not hospital) even suboptimal mask use and fabrics were more than sufficient if both parties are wearing them?
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Obviously, it must be over nose and mouth. The problem isn't the masks right now, it's that people can't decide that they should wear them.
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I will help you if you need it
But, there's also just getting people to use even a simple, comfortable clothe mask at all. -
Tesla just ran tests on their bioweapon defence mode. https://twitter.com/elonmusk/status/1274616317350301697?s=20 … Wonder if they could repurpose the equipment for PM2.5 testing on masks. You could use the Tesla ventilators to simulate breathing maybe.
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Masks must be tight-fitting. Gaps markedly reduce effectiveness.