Which Physician at Whuan Hospital warned his colleagues in December 2019 about the possible outbreak of an illness that resemble with severe acute respiratory syndrome later acknowledged as COVID 19?

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Which Physician at Whuan Hospital warned his colleagues in December 2019 about the possible outbreak of an illness that resemble with severe acute respiratory syndrome later acknowledged as COVID 19?A. Li Chen
B. Li Wenliang
C. Xi Chen
D. Xi Jinpeng