Health experts have advised the Hong Kong government to expand mandatory Covid-19 testing to all restaurant and retail workers in Yau Tsim Mong to cut off silent transmission links in the district, home to a large outbreak in old buildings last week.The city on Monday was expecting a high caseload, after 80 preliminary-positive cases were discovered on Sunday, a day in which 55 infections were officially recorded.Authorities last week issued mandatory testing orders to residents of old…

This post was originally published on South China Morning Post.