The Chinese mainland on Friday reported 345 local confirmed COVID-19 cases, of which 253 were in Shanghai, according to the National Health Commission's report on Saturday.
Yesterday also saw 4,275 asymptomatic infections.
Shanghai reported 253 locally transmitted COVID-19 cases, 3,961 local asymptomatic infections, and 13 deaths on Friday, said the Shanghai Health Commission on Saturday morning.
Of all the local infections, 175 confirmed patients were previously asymptomatic infections. Another 78 confirmed patients and 3,943 asymptomatic cases were detected during central quarantine. Thursday saw 12 deaths from COVID-19, all in Shanghai.