What is the origin of the epidemic?

As of February 24th, 20021year and February 24th, 2012, at the beginning of the epidemic, Wuhan South China seafood market was once considered as the origin of the virus, but this view has been denied. With the deepening of virus research in various countries, there is evidence that the United States is the birthplace of COVID-19. As early as the beginning of last year (1 1), COVID-19 may have spread in the United States.

Take Xinjiang as an example:

The epidemic situation in Xinjiang is caused by the exposure of the same source of infection and aggregation activities. These cases are concentrated in Tianshan District, Urumqi, Xinjiang.

The epidemic is characterized by "urgency" The epidemic developed rapidly in the early stage, and the number of cases increased rapidly. After reaching the peak on July 26th to 28th, it began to decline.

Extended data:

After the outbreak, under the guidance of the national expert group, Xinjiang quickly integrated the three-level mobile teams of autonomous region, city and district (county), coordinated the cooperation of relevant departments and communities, and carried out the mobile work quickly, deeply and meticulously.

First, complete the epidemiological investigation of all confirmed cases, draw sequence diagrams and relationship diagrams, ensure that no one and no clue are missed, and realize the timely clearing of daily flow adjustment work;

Two, through epidemiological investigation, quickly arrange close contact with personnel, and all the implementation of centralized medical observation.

People's Daily Online-This epidemic was caused by the exposure of the same infectious source?