Macau confirmed its first case of the new China coronavirus on Wednesday in a development highlighting the challenges of detection after the patient passed through health checkpoints without showing symptoms.It has left Hong Kong looking increasingly vulnerable to the spread of the virus, with cases confirmed earlier in its neighbouring cities of Shenzhen and Zhuhai in mainland China.There are 440 confirmed cases of the virus newly discovered in Wuhan, a city in central China. Nine people have…
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