An assembly-line worker in China coughs as an American businessman stands nearby , the businessman has a drink at a Hong Kong airport , then boards a flight for Los Angeles , and the virus , which has mutated to allow human-to-human transmission , is on its way .
Hong Kong
China
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China
Hong Kong
/location/country/administrative_divisions
China
Hong Kong
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LOCATION
China
LOCATION
Hong Kong
LOCATION
Los Angeles