People wearing facemasks ride a travelator inside a train station on the second day of the Lunar New Year of the Rat in Hong Kong on January 26, 2020, as a preventative measure following a coronavirus outbreak which began in the Chinese city of Wuhan. - Hong Kong on January 25 declared a mystery virus outbreak as an "emergency" -- the city's highest warning tier -- as authorities ramped up measures aimed at reducing the risk of further infections spreading. (Photo by DALE DE LA REY / AFP) (Photo by DALE DE LA REY/AFP via Getty Images)