Hong Kong is on high alert after the city logged its first locally acquired chikungunya infection on Sunday. An 82-year-old woman living in Fung Tak Estate in Diamond Hill, Wong Tai Sin district, tested positive for the virus despite having no recent travel history. City-wide anti-mosquito operations are now under way to prevent the spread of the chikungunya virus and health officers are reaching out to people living within a 200-metre radius of the patient’s home – considered the high-risk area...