Can you please point me to the confusing studies? Did you see at least one single study that convincingly shows that masks somehow increase the risk of infection?
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Replying to @Plinz @diviacaroline
No, you've confused the point here! That a study showed that is not convincing, but rather, a symptom of the lack of strong and consistent evidence that they are effective. Nobody thinks they make it worse (unless you engage in risky behavior as a result, of course).
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The confusion on the benefits does not extend from positive to negative infinity. But given the conflicting recommendations and results on the spectrum of ineffective to effective, it's hard to escape "confusing".
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Replying to @BobKerns @diviacaroline
That what not what I implied at all. I just have not seen studies that demonstrate convincingly that masks don't reduce infections, and several that seem to show the opposite. So if you say it's confusing, I want to know why.
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Replying to @Plinz @diviacaroline
Here's where you *asked* for studies showing it increased them. You introduced it. Glad we can dispose of it! It's confusing because there are studies, like the one I cited earlier, that suggest they're ineffective. If they were *convincing*, then we wouldn't have confusion!pic.twitter.com/xnhxHlgr8u
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I don't think anybody really thinks they have zero benefit. I am certainly NOT trying to argue that case in any event. But there are a host of questions within that space. Does your typical person wearing a mask reduce his risk of household transmission, for example?
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Or is it swamped by other factors, or do poor usage practices render it moot, etc. For healthcare, how much worse are surgical masks as PPE than N95, and are goggles or a face shield necessary, etc. That's why the conflicting advice. My own opinion is: wear them!
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Replying to @BobKerns
I just don't see that the evidence is somehow not clear or would deviate from common sense. Masks leads to a significant reduction in infections. They are by themselves not perfect (but that was never the claim). Further reduction requires face shields/goggles, helmets etc.
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Replying to @Plinz
Well, it's certainly not as clear as I'd LIKE it to be. But I'm used to dealing with uncertainty. I could list several things I do for which the evidence is less clear than for wearing masks.
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As for false sense of security, ref: people going about their business while ill, but thinking it's OK because they're wearing a mask. Less harmful, probably, but a long way from OK. And very much the norm in Japan.
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I am not asking you to tell a story. I have enough imagination to come up with stories about how masks could be harmful all day long. I want to see data.
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Replying to @Plinz
Me too, and I've not seen it. It was just an example that people do change their behavior. We're talking about the reverse usage (PPE). It's a relevant Q whether behavior change affects the risk at all! I'm not arguing it IS harmful, just that I can't dismiss it without data!
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And even if people DO change their behavior in harmful ways, if you don't identify and quantify that, what if *I* do *not* change *my* behaviour? Silently folding it into a blanket recommendation is wrong.
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End of conversation
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