The city reported 326 locally transmitted COVID-19 cases, 5,656 local asymptomatic infections, three imported patients and two imported asymptomatic cases on Tuesday, said the Shanghai Health Commission on Wednesday morning.Of all the local infections, 18 confirmed patients are previously asymptomatic infections. Seventeen confirmed patients and 5,131 asymptomatic cases were detected during central quarantine, while the rest were found in the screening of high-risk people.326 local casesThe first 17 patients tested positive during central quarantine.