Shanghai launched a new round of massive COVID-19 nucleic acid testing on Wednesday among people in areas at high risk of infection to help meet the "\\;dynamic zero-COVID-19"\\; target at the community level.Apart from those on high risky posts who are already under regular screening, everyone in the key areas will undergo two nucleic acid tests in two days, according to Zhao Dandan, deputy director of the Shanghai Health Commission."\\;The testing aims to detect potential infection source earlier, cut transmission and achieve dynamic zero-COVID-19 at the social level,"\\; he explained.&\\;nbsp\\;