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What is already known about this topic? A passenger who was from the United States was taken to the hotel for the required isolation on November 13, 2020. During the quarantine she was diagnosed as the COVID-19 patient on November 15, 2020. Controlling the importation of COVID-19 remains a major challenge.

An Investigation of a Confirmed Imported Case of COVID-19 Infected Abroad — Qingpu District, Shanghai Municipality, China, November 15, 2020