Shanghai has strengthened and upgraded its control measures at nucleic acid test sites and fever clinics as the recent COVID-19 epidemic situation in neighboring city Nanjing has become serious.

Nanjing, with a population of more than 9.3 million, reported 190 confirmed cases by Friday, since a resurgence of cluster infections emerged on July 20.

Shanghai has enhanced its COVID-19 prevention and control measures on people coming from domestic high-and medium-risk areas.