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In this Thursday, January 30, 2020, file photo, people queue up to buy face masks at a cosmetics shop in Hong Kong. Hong Kong cut off rail service to mainland China at midnight on Wednesday to Thursday to try to stop the spread of a new virus to the city. Foreign evacuees from the worst-hit region began returning home under close observation and world health officials expressed “great concern” that the disease is starting to spread between people outside of China. (Photo by Kin Cheung/AP Photo/File)
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