Hong Kong could face a higher risk of chikungunya fever spreading during the coming National Games as an outbreak across the border had yet to be brought under control, a leading infectious disease expert warned on Thursday, calling on the city to take preventive measures. Professor Jasper Chan Fuk-woo, of the University of Hong Kong’s department of microbiology, said that while the situation had improved compared with a peak in infections recorded earlier in mainland China, chikungunya...