A legitimate Question: when did COVID-19 first appear in the U.S.?

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Editor's note: A U.S. mayor claims he had COVID-19 last November, over one month before China reported its initial cases. If this was really the case, how did he get it and from where? How long ago did the virus start spreading in the U.S.? In this episode of Getting to the Point, CGTN anchor Liu Xin asks the big question!