All of Shanghai's city-level makeshift hospitals will be put on hold or shut down from Wednesday, except the last remaining facility on Chongming Island, according to the city's health commission.

Most designated COVID-19 hospitals will also revert to their normal operations after environmental disinfection and quarantine of medical staff are carried out, Zhao Dandan, deputy director of the commission, said.

"As the city's COVID-19 resurgence wanes, the number of patients at both the designated and makeshift hospitals is decreasing," he told the city's COVID-19 press briefing on Tuesday.