"Masks stop respiratory droplets sometimes!" is a ridiculous exercise in surrogate outcomes
We KNOW that masks are unlikely to prevent community acquired infections. THAT'S what we care about, not some statistics on particulate movement #COVID19
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AT BEST we can say that there's very low quality evidence that highly adherent mask use may modestly reduce the likelihood of infection for people wearing them, although this has not been demonstrated in the majority of trials
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You’re going to retract all this when CDC changes their guidelines, right? You realize current droplet protection standard worldwide is a procedure mask and eye protection ?
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I'll update my stance if the evidence changes of course, that's science
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I don't think low adherence in households transfers well to the current situation. If we had enough masks the unknows we have about the topic would more likely lead me to recommend the use of them for the overall public.
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Thanks yes. The chatter seems to have moved on from “chloroquine will save the world” to masks. I have been replying “fine if you want to wear a mask but stop stealing them from my clinic and hospital”. Most of the mask “evidence” seem to be “but x is doing it”.
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The abstract on that CDC article is: It seems like it is saying they are not useful because people don't wear them consistently. Not that masks don't work.pic.twitter.com/pdEAPOVhFS
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Working is a function of use. If it was a drug that only worked for a small proportion of people in per-protocol analyses, we'd absolutely conclude that it was ineffective
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