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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You should also take the sensitivity of the first test into account. Also, number of cases was less than 30 per million at the time this gives a <0.1% chance to be infected over 30 days, how can it be 2% in the study? FP must be higher
But note that they did not exclude people without baseline tests in their main analysis! Only their sensitivity analysis did this. And there are many.
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