Shanghai officials said on Wednesday that half the city had achieved “zero COVID” status, but uncompromising restrictions had to remain in place under a national policy that the head of the World Health Organization described as “unsustainable.” Data released by Shanghai, in its sixth week of a painful lockdown, showed the city recorded no cases outside areas under the strictest curbs on Tuesday for the first time since May 1. Half of the city’s 16 districts had achieved zero COVID status having not recorded any such cases for three days. Despite achieving that important milestone, officials said it was not time to ease curbs. “We must clearly recognise that the current situation […]