SHANGHAI -- Shanghai will downgrade the last middle-risk area to low-risk for COVID-19 on Friday as a local resurgence of the disease has been brought under control, local authorities said Thursday.

With the downgrade, the entire city of Shanghai will become low-risk for the epidemic, according to the municipal COVID-19 prevention and control leading group.

The city will continue to implement regular prevention and control measures, the group said.

Since Jan 21, Shanghai has seen 22 locally transmitted COVID-19 cases, according to the municipal center for disease control and prevention.