More than 99 per cent of Hong Kong residents have low immunity against the new “super flu”, a team of researchers has found, as they urged the public to get vaccinated against the rapidly spreading strain. Despite the low level of immunity among the city’s population, the team from the University of Hong Kong’s (HKU) faculty of medicine on Tuesday assured residents that current vaccines were still as effective at preventing the spread of infection. “These data serve as a clear alert for Hong...