The seriousness of the epidemic in Shenzhen is mainly related to several reasons. Because before, when there was a local epidemic in China, dozens or hundreds of cases were diagnosed at most. However, the local epidemic in Shenzhen has not been controlled in a short time, but has continued from the beginning of this year to the present. The following small series analyzes the serious causes of the Shenzhen epidemic as follows:

1. One reason why the epidemic situation in Shenzhen is so serious is that it belongs to a port city.

Shenzhen has the largest number of entry and exit ports in China, including Luohu Port, Futian Port, Shenzhen Bay Port, Wenjindu Port, Huanggang Port, Shatoujiao Port, Fuyong Port and Shekou Port, and it is also one of the cities with the largest population mobility. At present, the epidemic situation abroad is so serious that Shenzhen, as a port city, is under great pressure of prevention and control, and it is inevitable that overseas input will spread in China.

The epidemic situation in Shenzhen is so serious. Second, the outbreak of the epidemic in Hong Kong.

Earlier, Carrie Lam Cheng Yuet-ngor, Chief Executive of the Hong Kong Special Administrative Region, sought help from the Shenzhen government to control the local epidemic. Hong Kong and Shenzhen are relatively close, and some Shenzhen residents basically travel back and forth between Shenzhen and Hong Kong, so it is also possible to infect people through things.

The reason why the epidemic situation in Shenzhen is so serious is that the global epidemic situation is in the epidemic stage.

Recently, the epidemic situation in Hong Kong has also touched people's hearts. As a port city, Shenzhen should not only ensure the living materials in Hong Kong, but also do its own epidemic prevention and control in an open environment. The pressure of "import and external defense" is huge, and the risk of epidemic spread remains high.

The reason why the epidemic situation in Shenzhen is so serious is because of Omicron.

According to the genetic determination, the current epidemic situation in Shenzhen is caused by Omicron BA.2 mutant, and Omicron strain is easier to spread. The infectivity of this subtype is 30% higher than that of the original strain of Biomijon, which puts forward higher requirements for our prevention and control work.