A representative study of antibodies requires both a complete list of people (like the White Pages) & the power to compel them to give a sample (like jury duty). Compelling 1/N people to give a sample is arguably better than N in lockdown. But it raises civil liberties concerns.https://twitter.com/jonatanpallesen/status/1251197801322684416 …
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Yes. Let Y =1 if they enroll and 0 else Let X = 1 if they are symptomatic and 0 else I argue P(Y|X=1) != P(Y) Because people who are symptomatic may disproportionately opt out, because they don't want the stigma or economic hit of being quarantined.
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