The city reported 2,494 locally transmitted COVID-19 cases, 16,407 local asymptomatic infections, one imported case and one asymptomatic infection on Tuesday, said the Shanghai Health Commission on Wednesday morning.Of all the local infections, 533 confirmed patients were previously asymptomatic infections. Another 1,800 confirmed patients and 16,178 asymptomatic cases were detected during central quarantine, while the rest were found in the screening of high-risk people.2,494 local casesThe first 1,800 patients tested positive during central quarantine.