There are confirmed cases in Chengdu, and a large number of citizens do nucleic acid in the rainstorm! Why is the epidemic repeated?

A new case of COVID-19 was confirmed in Chengdu, and the local nucleic acid detection work was started again. The reasons for the repeated outbreaks include: 1, the global epidemic is not over, and there is variation in COVID-19. 2. The relatively high mobility of personnel has led to the spread of the epidemic. 3. The decrease of people's awareness of protection leads to repeated outbreaks.

First, the global epidemic is repeated, and COVID-19 is constantly changing.

Since the outbreak of the epidemic, WHO said that the global epidemic will not end in a short time, and it will occur sporadically and repeatedly around the world or even across the country due to the rapid mutation in COVID-19. Delta and Omicron are the most popular strains in China, but the COVID-19 strains found at present are mysterious Keron- subfamily BA.4 and BA.5, which spread faster and have a longer incubation period. It means that more mild patients and asymptomatic infected people will be found, so patients can't be found without high-frequency nucleic acid testing. Once discovered, it means that the epidemic has spread invisibly and spread in society, which will cause the epidemic to happen again and again.

Second, the mobility of personnel is relatively large during the summer vacation.

At present, the mobility of domestic personnel is relatively strong, and college students all over the country are facing summer vacation. At the same time, it is also the peak period of job-hopping in China. With the relaxation of international epidemic prevention policy, foreigners have also increased the frequency of returning to China. In this case, the risk of cross-infection between people will greatly increase, especially in public places, such as railway stations and airports. At the same time, the domestic tourism industry has gradually recovered, so there are a large number of migrants in many areas, which poses obvious epidemic risks to the local area and leads to repeated local epidemics.

Third, people's epidemic prevention work is lax.

After the domestic epidemic situation was relatively stable, many areas adjusted their epidemic prevention policies. In addition to issuing vouchers such as health codes, people no longer wear masks as required and disinfect contact items at high frequency. Therefore, when there are individual cases, the surrounding people will be exposed to dangerous environment and infected, which will lead to repeated outbreaks.