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Transmission chain of 22 COVID-19 cases associated with a multi-family cluster. (A) Family structure and transmission chains linking all 22 infected patients in the cluster. (B) Duration of exposure to index case, dates of symptom onset, duration of isolation, hospitalization for all close contacts of patients 14, 15, 16, and 19 outside of family A. Exposure history in family A were not presented because of heavily overlapping contact history between cases.
