The case resides in Songjiang District. on August 18, the unit routine testing of nucleic acid found abnormal, isolating the case for observation. After review by the city and district CDC, the nucleic acid test results were positive. Clinical expert consultation and laboratory nucleic acid test results confirmed the diagnosis of new coronavirus pneumonia. Currently, 11 close contacts in the city have been tracked and placed under centralized isolation and observation. Terminal disinfection of areas where cases are active has been conducted.

According to the epidemiological investigation, the local case confirmed on Aug. 18 involved the following areas and locations. The case is a staff member of Songjiang District Central Hospital, female, 25 years old. The residence in Shanghai is Youlu Apartment, 855 Cangfeng Road, Yongfeng Street, Songjiang District, Shanghai. The case has been vaccinated with the New Crown vaccine. The hospital organized routine nucleic acid tests every three days since August 2. The results were negative. Epidemiologic investigation showed that the case did not leave Shanghai within 14 days. In addition to his workplace and residence, he also visited the Shangpin Fresh Supermarket under the apartment building, Ah Bing Fruit Shop under the apartment building, and Grandma's New Ideal Plaza Store. Currently, the above locations have been closed for management and sterilization. In addition, according to the investigation, he had visited Shanghai Five Senses Hospital for eye diseases.

As of 8 p.m. on Aug. 19, 18 close contacts of the case have been found in the city, all of whom have been put under centralized isolation measures, and the first nucleic acid test results were negative. The 100 people who have confirmed close contact, all of whom have implemented centralized isolation measures, the nucleic acid test results were negative. Screening of 9,188 subjects, nucleic acid sampling completed. Nucleic acid test results are negative.

610 samples of articles and environment from relevant places have been collected, of which one sample is weakly positive and the rest are negative for nucleic acid. Sterilization measures have been taken at the places concerned. Songjiang District Central Hospital has suspended outpatient and emergency services since Aug. 18 and implemented closed-loop management. Shanghai is categorized as a medium risk area. According to the relevant requirements of the State Council's Joint Prevention and Control Mechanism and the research decision of the Municipal Prevention and Control Office, No. 855 Cangfeng Road, Yongfeng Street, Songjiang District (Yuelu Apartment) has been categorized as a medium-risk area, while other areas in Shanghai are low-risk areas.