Hacker News Comments on
Why Masks Work BETTER Than You'd Think
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⬐ eth0upSolid math and reasonable general principles, with an element or two I question. He comes close to clarifying it, though not quite. And while the percentage of 50 was a disposable placeholder to illustrate valid points, I doubt cotton could be quite so effective as 50% leading to 75% (and certainly not 100%) and some assumptions are required to flow along with the logic, as was mentioned. This is still reasonable for a fast-paced video; some finicky details must be overlooked. However, it is primarily based on math and no data was shown giving any unambiguous indication for cotton efficacy. Also, he addresses directionality as nearly equal for the illustration, but later provides another resource that accounts for it in detail. Was this prefactored? Otherwise surprisingly apropos and worthwhile.Thank you
⬐ rnjesusyou’re welcome. i’m a bit low on sleep so i missed part of your question, and don’t think the video addresses it — that is, are two [cotton] masks more effective than one. i honestly think that this is an interesting question. for most people, their intuition would be to answer “probably,” but i suspect there are some complexities that someone smarter than i am would have to address.wearing two masks instead of one wouldn’t make things worse, though. but better? again, good question.
"Why Masks Work BETTER Than You'd Think" https://www.youtube.com/watch?v=Y47t9qLc9I4"The Astounding Physics of N95 Masks" https://www.youtube.com/watch?v=eAdanPfQdCA
Masks were not recommended in the early stages of the pandemic in most countries because that would have cut into the limited supply of N95 masks that were prioritised for medical staff.
Then there wasn't much good evidence to show if COVID specifically could be stopped by masks, or if so, what kind of masks help and how much. Thankfully, many research groups took to the challenge and published paper after paper in rapid succession to show that, yes, masks help a lot, even if they're made at home from a t-shirt. E.g.: https://www.youtube.com/watch?v=DNeYfUTA11s
With the pandemic running rampant across the United States, the advice was updated.