There have been many different versions of “herd immunity”. Anthony Fauci, director of the National Institute of allergy and infectious diseases, warned on Thursday that “the death toll will be huge” if the United States continues to allow uncontrolled transmission of the new coronavirus to achieve so-called mass immunization. < / P > < p > “if everyone is infected with it, even if the proportion of asymptomatic is relatively high, many people will die.” He said in an interview. According to epidemiologists, group immunity is a necessary condition for virus control. Only when enough people are vaccinated, or survive after infection, and establish antibodies to resist new infections, can the goal of group immunity be achieved. There will not be enough hosts for the virus to infect. Mike Ryan, executive director of the WHO health emergency program, said last month that most scientists believe that at least 60% to 80% of the population must be vaccinated or have natural antibodies to achieve mass immunization. However, according to Johns Hopkins University statistics, although the new coronavirus has only infected less than 2% of the population in the United States so far, it has caused at least 167097 deaths (as of press release). < / P > < p > fudge warned that uncontrolled transmission of the virus to gain group immunity would bring the death toll to “totally unacceptable” levels. Americans tend to have more underlying diseases, such as diabetes and obesity, which will lead to higher mortality of the new coronavirus. < / P > < p > “if you look at the obesity epidemic, the number of people with hypertension and diabetes in the United States, if everyone is infected, the death toll will be huge and totally unacceptable.” “That’s why we are against it,” he added. “Let everyone get infected, and we’ll be fine.” that’s a bad idea Who officials have also warned that “do not try to achieve mass immunization by allowing the new coronavirus to spread rapidly in the community”, which will overburden hospitals and lead to more deaths. The agency believes that there is no “panacea” for the treatment of the new coronavirus, and it will never be possible, and urges countries to practice “basic principles”, including testing, isolating and treating patients, as well as tracking and isolating their links. Novel coronavirus pneumonia is a new term for
. The term “group immunity” comes from the field of veterinary epidemiology. It should be cautious when applied to human infectious diseases such as new crown pneumonia, and avoid personal life and pain. The agency said. A large Spanish study published last month in the lancet, the British Medical Journal, also showed that “mass immunization” may be difficult to achieve during the new coronal epidemic. It is still necessary to avoid the gathering of people, detect and isolate the new infected persons and their close contacts in time. < p > < p > this study involving more than 60000 people funded by the Ministry of health of Spain showed that only 5% of the people in Spain produced antibodies against the new coronavirus, which was far from “mass immunization”. Marina Bolian, who led the study, said it would be difficult to achieve mass immunization unless one accepted the heavy costs of high-risk deaths and overloaded health care systems.