lsh123: (Default)
lsh123 ([personal profile] lsh123) wrote in [personal profile] stas 2020-04-07 05:28 am (UTC)

Not really — it is not purely random but it is not like we are selecting people for testing to get exactly 20% covid ;) Most of the testing is done on patients with symptoms. So if this thing is spreading then we should see increased number of patients with symptoms who have covid (see conditional probabilities;) ).

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