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    Home > Medical News > Medical Science News > Immunity may last up to 6 months after infection with the new crown

    Immunity may last up to 6 months after infection with the new crown

    • Last Update: 2021-01-22
    • Source: Internet
    • Author: User
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    , published online in the journal Nature, showed that immunity to the new coronavirus may last at least six months. The study analyzed 87 people who had been infected with the new coronavirus and found that their specific memory B cell levels remained in the body throughout the study period -- memory B cells were immune cells that remained in the body after infection, proliferating rapidly and producing antibodies in the event of a new coronavirus re-infection. The results show that individuals infected with the new coronavirus may be able to respond quickly and effectively when they are exposed to the virus again.
    the body's immune system produces antibodies when infected, which specifically neutrally infect the original. Human antibodies against the new coronavirus have been shown to prevent infection in animal models. Levels of these antibodies may decrease over time, but memory B cells, as they are called, can "remember" the infectious original, inducing the immune system to produce the same antibodies when re-infected.
    Nussenzweig of Rockefeller University in New York and colleagues assessed the conditions of 87 patients diagnosed with COVID-19 1.3 and 6.2 months after contracting the new coronavirus. They found that while the activity of the meso-antibody decreased over time, the number of memory B cells did not change. In addition, the authors demonstrated that these cells produce more antibodies than the original antibodies and are more resistant to mutations in the prickly proteins that help the virus enter the cells.
    these observations show that memory B cells have the ability to evolve in the presence of a small number of persistent viral antigens (small proteins of the virus that can be recognized by the immune system). The authors conclude that the continued presence and evolution of memory B cells suggest that in the event of a new coronavirus re-infection, the human body may be able to quickly produce powerful virus-mediated antibodies. (Source: Feng Lifei, China Science Journal)
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