9/n On the other hand, as the authors note, closing schools and universities appears to have had a disproportionate impact on the spread of COVID-19
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This reminds me of the challenge disentangling different tobacco control measures & impact on smoking rates. Taxation, advertising restrictions, plain packaging, mass media campaigns - all powerful together & difficult to separate effects out individually.
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So picking or choose one or two isn’t going to get you reduced smoking rates - we’ve seen what happens when countries do this. You need to implement & sustain a whole suite of interventions over time.
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It's pretty hard to evaluate things like mask wearing if you're not even trying to measure compliance. Also https://statmodeling.stat.columbia.edu/2020/06/17/the-point-here-is-not-the-face-masks-its-the-impossibility-of-assumption-free-causal-inference-when-the-different-treatments-are-entangled-in-this-way/ …
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The thing that strikes me with this study is if the order of things were changed would the results seen be different. Shutting schools and unis earlier would that have impacted Covid cases? If mask wearing came in much earlier would that impact results. Good Summary
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