[Introduction]: On October 16, Shanghai Huadu District found an overseas imported asymptomatic infected person. The disease control department investigated all personnel in the area involved in the activity track of the infected person, at present, 116121 people have been tested, and the results are all negative.

Expand the scope of investigation: 116121 people have been tested and the test results are all negative.

In response to the epidemic, the disease control department quickly took the following measures: first, quickly identify and centrally isolate close contacts, and second, aiming at Wang’s activity track after October 1, 12 key sites were identified and investigations were carried out around these 12 key sites, and the residents of 5 villages, 1 residence committee and 1 Scenic Spot involved in key places should be inspected thoroughly. At the same time, in order to ensure safety, the disease control department also appropriately expanded the scope of investigation and added several neighboring villages.

As of 2: 00 on October 17, the disease control department had identified 170 close contacts and all of them had been isolated intensively. The nucleic acid test results were all negative; all personnel in the area involved in the activity track of the infected person were investigated. At present, 116121 people have been tested, and the results are all negative.

Risk assessment of prevention and control: the scope of activities of infected persons is limited, and the epidemic does not spread.

What is the current situation of epidemic prevention and control in Shanghai? Zhang Zhoubin, deputy director of Shanghai CDC, introduced that Wang had been tested for nucleic acid on October 5, and the result was negative. However, only three days after he contacted the new Crown nucleic acid positive immigrants on December 12, it was discovered in time through routine health monitoring of isolated hotels. During the three days from October 12-15, Wang’s scope of activities was relatively limited. In order to ensure safety, the disease control department extended the backtracking investigation time to October 1.

Zhang Zhoubin said that according to the current investigation situation, according to the comprehensive judgment, the epidemic has not spread, and the disease control department will continue to do a good job of centralized medical isolation observation of close contacts in accordance with the regulations. Citizens are invited to continue to cooperate with the requirements of normalization prevention and control of the epidemic without panic, and do necessary personal protection.