Shanghai reported six locally transmitted COVID-19 cases with mild symptoms and 55 local asymptomatic cases on Sunday afternoon.The new local cases include two former asymptomatic patients who showed symptoms later. The other new and asymptomatic cases tested positive after being centrally quarantined or screened as close contacts of previous cases, according to Lu Hongtao, deputy director of the Shanghai Health Commission.Meanwhile, 1578 Hongmei Road S. of Meilong Town in Minhang District and 1811 Xuefu Road, Jinshanwei Town of suburban Jinshan District have been elevated to medium-risk areas.