A traveller wears a face mask and a plastic shield in the arrival hall of Hong Kong International Airport in Hong Kong, China, 19 March 2020. From 19 March 2020, in Hong Kong all arrivals must undergo a 14-day self-isolation at home followed by two weeks of medical surveillance, and travellers are required to wear an electronic wristband and download an app to monitor their movements. (Photo by Jerome Favre/EPA/EFE)
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