BEIJING — The Chinese mainland on May 21 reported 157 locally-transmitted confirmed COVID-19 cases, of which Shanghai and Beijing both reported 52, according to the National Health Commission on May 22.

Apart from Shanghai and Beijing, five other provincial-level regions on the mainland also saw new local COVID-19 cases.

Shanghai also reported 570 locally transmitted asymptomatic infections of the novel coronavirus on May 21, out of a total of 667 local asymptomatic carriers newly identified on the mainland.

Following the recovery of 476 COVID-19 patients who were discharged from hospitals on May 21, there were 4,405 confirmed COVID-19 cases receiving treatment in hospitals across the Chinese mainland.

Three new deaths from COVID-19 were reported in Shanghai, according to the commission.