The first rule of epidemiology: check your denominator 2nd rule: check your denominator again It can explain an amazing number of the differences that people are observing this year for COVID-19
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But the denominator is shifting there, because our definition of who has COVID is changing (think about who got tested in March vs now). So you can't really compare these proportions easily, because the denominator has changed
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That makes sense. Thank you!
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