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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

1 passage

abstractpubmed· Abstract· item 33528529

Asymptomatic SARS-CoV-2 Infections Among Persons Entering China From April 16 to October 12, 2020. This population epidemiology study characterizes trends in the prevalence of asymptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among international entrants testing positive for SARS-CoV-2 at Chinese border checkpoints between mid-April and mid-October 2020.