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On Jan. 21, 2020, the U.S. Centers for Disease Control and Prevention confirmed the United States' first known case of novel coronavirus -- what would later come to be known as COVID-19. On This Day, Jan. 21: CDC confirms first U.S. case of COVID-19
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On Jan. 21, 2020, the U.S. Centers for Disease Control and Prevention confirmed the United States' first known case of novel coronavirus -- what would later come to be known as COVID-19. 
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