Hong Kong researchers have already developed a vaccine for the deadly Wuhan coronavirus – but need time to test it, according to infectious diseases expert Professor Yuen Kwok-yung.Scientists in mainland China and the United States were also separately racing to produce a vaccine for the new coronavirus, which has killed more than 100 people and infected thousands.Yuen, chair of infectious diseases at the University of Hong Kong, revealed that his team was working on the vaccine and had…
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