On June 25th, among the confirmed cases on June 2th, two cases were stall owners of the food city on the second floor of Tiankelong Supermarket. They were a couple and had no new contact history. Beijing Haidian Liudiao personnel launched an emergency investigation and finally locked the address of No.7 Yongding Road. It has appeared in the activity place where confirmed cases were reported four times. The epidemic situation in Tiankelong supermarket was caused by the third-hand infection of the epidemic situation in Xinfadi.

from : to 24: on June 24th, 13 newly confirmed local cases were reported in Beijing, and there were no new suspected cases and asymptomatic infected people. Since the cluster epidemic occurred in Xinfadi wholesale market on June 11th, Beijing has reported a total of 269 local confirmed cases and 269 in hospital. 22 cases of asymptomatic infection are still under observation.

Extended information:

There are four main sources of asymptomatic infections:

First, close contacts of COVID-19 cases, and some of them were found during the medical observation period.

Second, in the investigation of cluster epidemic, asymptomatic infected people may be found in the process of carrying out some active testing.

Third, in the process of tracing the source of infection of COVID-19 cases, asymptomatic infected people may be found when the exposed people are actively tested.

Fourth, asymptomatic infected persons may be found when people with COVID-19 cases, travel history and residence history in areas with persistent transmission are actively tested.

China. com-What happened when the couple were confirmed to be infected in the public toilet without going to the epidemic area? Beijing confirmed that the couple did not go to the new place for third-hand infection.