Hong Kong is worried about healthy-looking chickens in China that are carrying the H5N1 bird flu virus as they are capable of silently infecting people, the city’s health minister said on Wednesday. The comments from Health Minister York Chow come as health authorities in mainland China are trying to confirm if a 31-year-old truck driver in Shenzhen, a bustling city just across the border from Hong Kong, may be infected by the virus. Full Story