Coronavirus transmission chains in Hong Kong could be cut off by more than 90 per cent if citywide testing was completed in three to seven days, the head of a major laboratory operator has said.Sunrise Diagnostic Centre chairman Anthony Wu Ting-yuk told a television programme on Sunday that citywide Covid-19 testing should be ideally completed in three to seven days, with every resident taking two or three tests within the time period.“That would cut off 90 to 95 per cent of transmission chains…
