Where's COVID-19? Will it disappear? Expert response

　　Recently, the question of "where has COVID-19 gone?" has aroused extensive discussion. The Centers for Disease Control and Prevention in many provinces and cities issued a prompt that at present, many places are in the state of sporadic cases, and no new mutant strains have been detected. At the same time, with the warming of the weather, some netizens have asked what will happen to COVID-19? Will COVID-19 disappear in spring and summer?

　　How to view the current case distribution status?

　　It is reported that recently, people feel that there are few COVID-19 infected people around. The Centers for Disease Control and Prevention in Beijing, Hubei, Sichuan and other provinces and cities have issued the latest prompt that many places are in the state of sporadic cases, and no new mutant strains have been detected.

　　In this regard, Li Dong, the chief physician of the Department of Respiratory and infectious diseases of Beijing You'an Hospital, explained to chinanews. com that the sporadic cases were because more than 80% of people in most areas had formed an immune barrier after infection in the past one or two months. He said that a large number of infections similar to those before would not occur in a short time. However, as there are still a small number of people who are not infected, this spread may lead to the next round of epidemic in the future.

　　What factors will affect reinfection?

　　Li Dong once said that the spread of the virus requires susceptible people. Once the antibody level of everyone is low, it may trigger the next round. If the virus does not mutate significantly, the antibody produced by the previous infection can protect it for more than half a year, and the next round of infection may be half a year later.

　　Lu Mengji, a professor at the Viral Research Institute of Essen University School of Medicine in Germany, believes that the subsequent transmission of COVID-19 in China may be fluctuating, and the time of occurrence and transmission of the virus will be affected by the emergence of new strains, climate change, large-scale population movements (such as the Labor Day tourism peak in May), etc.

　　How to deal with the decline of antibody level in the population?

　　Li Dong once said that even though the antibody level decreased, because everyone was out of sync, some people might have a fast decline in antibody level, others might have a slow decline, and the protective effect would last a long time. Therefore, the next round or someone might have infected first, and someone would have infected later. The epidemic peak would not come so fast, so fierce, and there would not be a large number of infections in a short time.

　　Li Dong once believed that people with low immunity and no vaccination might be the earlier group in the next round of epidemic. People who have been infected, especially those who have been vaccinated, their infection based on vaccination is called breakthrough infection. Even if they are infected for the second time or the third time, the risk of becoming serious or critical cases will be relatively small.

　　Will COVID-19 disappear?

　　Lu Mengji told chinanews. com that some data recently released by the China Center for Disease Control and Prevention suggest that COVID-19 has not disappeared at present, and the alleviation of the current epidemic infection cannot be regarded as an end. "This is a misplaced cognition," he said.

　　Li Dong once believed that, at present, it is unlikely that the COVID-19 will disappear completely as SARS did in 2003. He explained that the global COVID-19 infection situation is not synchronized. In some places, there are few new cases now, some continue to exist, and many places have repeated epidemic peaks. There are still infected people in the society, so everyone has the risk of re-infection. He judged that COVID-19 infection may be as phased as influenza and will not disappear completely.

　　"In general, the people who need to focus on protection in the future are the elderly, people with low immunity, patients with basic diseases and other vulnerable groups." Li Dong once suggested that on the one hand, we should adhere to wearing masks, washing hands frequently, opening windows and ventilation more, and maintain social distance. On the other hand, the level of protection can be improved by vaccination again.

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