Why did the Xi epidemic develop so badly?

Recently, the epidemic in Xi has touched the hearts of people all over the country. Since the first local confirmed case appeared in Xi on February 9th, 65438, the number of confirmed cases has risen to113 in just 20 days. Recently, nearly 200 cases have been added every day.

After Shijiazhuang and Wuhan, another serious epidemic occurred in the whole country, which made the people of the whole country extremely worried. So why is the epidemic in Xi 'an so fierce? Why is it so serious?

The source of Xi 'an epidemic is the virus brought by Pakistan flight. That is, imported cases. The transmission chain is that the positive cases were not found in time in the isolation hotel at the initial stage, and the virus lurks in the human body 1 1 day. In this incubation period. The people exposed to the source of infection quickly spread to the society, which led to the serious development of Xi epidemic.

After 16 rounds of nucleic acid detection. All the airport staff tested negative for nucleic acid. COVID-19 is the chief culprit of the Xi epidemic. It belongs to Delta mutant. Delta is the most powerful mutant strain found so far. The number of infected people is large, the load is high, the transmission speed is fast, and the incidence is hidden. It is extremely difficult to check the secret connection and the sub-secret connection

Clinical Delta strain. The symptoms are atypical. The patient turns negative slowly, and the treatment time is particularly long, which is prone to severe illness. If a person is infected with several other COVID-19 viruses, each virus infects 2-3 people on average. Delta mutant infected people will infect 6-8 people. Delta mutant strain is spreading. Most of the severe patients are elderly people with children at the same time.

Among the confirmed cases of δ mutant in COVID-19 recently reported continuously. Some cases have been vaccinated before. Infection after vaccination does not mean that the vaccine is invalid. Inactivated virus vaccine has protective effect.

Check the Delta virus strain. From the laboratory data and the limited data above Guangzhou 160, it is found that all close contacts have used vaccines, and both those who have been vaccinated and those who have never used vaccines can see its protection. It has more than 60% protection against infection. It has a protective effect of nearly 80% on severe cases.

At present, the concept of close contact with infectious diseases in the past is not applicable to the present because of the high viral load and high exhaled virus concentration of Delta mutant patients. Now the concept of close contact is in the same space, the same unit and the same building four days before onset. People who get along with patients are close contacts. I want to remind everyone here. Change the previous concept of close ties.

This is the reason why the Xi epidemic has developed so fast. This is serious. Although the epidemic in Xi is so serious this time. But our epidemic prevention practice and achievements in COVID-19 in the past two years have proved this point. Prevention and control measures of early detection, early diagnosis, early isolation and early treatment. Can effectively curb the epidemic. Vaccination has a good preventive effect. Do both. The epidemic situation in Xi 'an will be contained in the shortest time. People in Xi and China don't have to worry too much. Xi 'an is sure to win. Cheer for Xi 'an!