The city reported 2,634 locally transmitted COVID-19 cases, 15,861 local asymptomatic infections, one imported case and two asymptomatic infections on Wednesday, said the Shanghai Health Commission on Thursday morning.Of all the local infections, 459 confirmed patients were previously asymptomatic infections. Another 1,976 confirmed patients and 15,619 asymptomatic cases were detected during central quarantine, while the rest were found in the screening of high-risk people.2,634 local casesThe first 1,976 patients tested positive during central quarantine.