In this Jan. 4, 2020, file photo, a health surveillance officer monitors passengers arriving at the Hong Kong International airport in Hong Kong. A preliminary investigation into viral pneumonia illnesses sickening dozens of people in and around China has identified the possible cause as a new type of coronavirus, state media said Thursday, Jan. 9, 2020. In Hong Kong, 15 patients with symptoms of respiratory illness were being treated as of Sunday. (AP Photo/Andy Wong, File) ** FILE **
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