The city reported 355 locally transmitted COVID-19 cases, 5,298 local asymptomatic infections, three imported patients and one imported asymptomatic case on Wednesday, said the Shanghai Health Commission on Thursday morning.Of all the local infections, 16 confirmed patients are previously asymptomatic infections. Ten confirmed patients and 4,477 asymptomatic cases were detected during central quarantine, while the rest were found in the screening of high-risk people.355 local casesThe first 10 patients tested positive during central quarantine.