China News Service, July 14th, a comprehensive report, a study by King’s College London, UK, shows that people with new coronary pneumonia may lose immunity to the virus within a few months, which means the disease may become like ordinary A seasonal epidemic disease like a cold may have a “significant” impact on how the government responds to the epidemic.
The British "Guardian" reported that researchers at King's College London have studied the antibody concentration of more than 90 newly diagnosed patients and observed how the concentration changes over time.
Blood tests have shown that even patients with only mild symptoms have a certain degree of immune response to the virus. In the experimental group, 60% of patients showed a "strong" antigen-antibody reaction several weeks after infection, but after 3 months, only 16.7% maintained a high concentration of COVID-19 antibody. During this period, the antibody level of the rehabilitated people can drop by a maximum of 23 times, and some people's antibody levels have even fallen to undetectable levels.
In addition, the World Health Organization (WHO) official said on the 13th that patients with recovered new coronary pneumonia may be infected with new coronavirus again, and their immunity may weaken after a few months. Dr. Maria Funkhof, the head of the WHO's Emerging Diseases and Zoonoses Department, emphasized that scientists have not yet provided a complete answer. There is not enough data to show that antibodies can ensure immunity against the new coronavirus.
The lead author of this report, Katie Dolores, said: "People will have a reasonable antibody response to the virus, but this reaction will weaken in a short period of time, and the length of time the antibody stays depends on how high the antibody level is. high."
The report shows that the antibody level of the severely ill is higher and the duration is longer. This may be because they have more viruses in their bodies, prompting the body to produce more antibodies to fight infection.
Virologist Jonathan Heiny of Cambridge University pointed out that this is another study that shows that the human body's immunity to coronavirus is not sustainable. "The most important thing is that this further denies the concept of the danger of fighting coronary disease through group immunity. ".
The results of this study are also important for the development of coronary disease vaccines. Dolores said that the protection provided by any vaccine may subside within two or three months. Robin Shatok, a professor at Imperial College London who is developing a new crown vaccine, also pointed out that this research shows that people may have to be vaccinated every year.