If tissue and kitchen paper masks achieve 90% of the filtering function of a surgical mask, why the CDC is not recommending them?
What are some medical conditions and disabilities that might prevent someone from wearing a face covering during the COVID-19 outbreak?
Do oxygen and carbon dioxide move with Brownian motion? And, if so, do they get trapped by N95 masks?
Which studies have shown that UV radiations fail to reach some part on the mask and therefore may not be suitable for sanitizing masks?
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