So, The Big Mask study has been published, and I thought rather than expound on what the results DID show (everyone's doing that), I might point out a few things that they DIDN'T show 1/npic.twitter.com/zG4jtXQVVq
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Yes, I've been involved in a few discussions about possible RCTs of interventions in recent months, and the sample sizes can quickly get very large...
At the population level the problem is that the gain (say 20% for example) is then greedily swallowed by society and governments which then just relax the brake to bring R back to 1; so no real improvement in transmission but does help the economy.
When I saw that the study was powered to find a 50% reduction, I stopped reading.
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