Shanghai predicts the outbreak time.

The epidemic in Shanghai in 2022 began on February 28th, because on the afternoon of March 28th, 2022, a press conference on epidemic prevention and control was held in Shanghai, at which 1 local case was reported. The case showed that a 56-year-old female retiree went to tongji hospital fever clinic on the afternoon of March 28th, and the result of COVID-19 nucleic acid test was positive. On March 1 day, COVID-19 was found to be positive for nucleic acid detection by Shanghai CDC. At that time, West Du Ming Garden, No.55 Zhidan Road/KLOC-0, Putuo District, where the infected people lived, was controlled, and Shiquan Community Cultural Center, No.33 Ningqiang Road, Shiquan Street, Putuo District, was classified as a medium-risk area, and the risk level of other areas in Shanghai remained unchanged.