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Whether or not you are immune to Corona 19 has been judged by the presence or absence of antibodies.

However, in addition to the antibody, there are other cells that can block Corona 19, and research results have shown that they last longer than antibodies.



Medical reporter Cho Dong-chan will explain in detail.



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This woman was diagnosed with Corona 19 in March.



[Corona 19 recoverer: I was admitted to a hospital after going to a facility quarantine.

So, I received treatment for about a month.]



I was diagnosed with cure at the end of April and discharged from the hospital, so I am in good shape.



Of the 22,000 people diagnosed with cure for the coronavirus in Korea, only one case has been estimated to be reinfected so far.



Even if he was infected with Corona 19, 20-50% of the antibodies do not develop, and even if it does, it usually disappears within three months.



Studies are being published one after another explaining why.



Until now, it was thought that there is only immunity when neutralizing antibodies are present, but there is a separate T cell that can directly fight the corona 19 virus.



Unlike antibodies that disappear within three months after the onset of symptoms, T cells, one of the immune cells, are maintained for a long time for more than 1 year and immediately activate the immune response when reinfected.



[Geun-Hwa Lee/Professor, Department of Microbiology, Hanyang Medical University: T cells can either directly kill virus-infected cells, or they can activate B cells (which make antibodies).] The



research team found that the reason most of the young Corona19 patients pass lightly without antibodies is T It was analyzed that it was due to the cells.



It also appears to help compare different types of vaccines.



[Yigeunhwa / Hanyang University School of Medicine Department of Microbiology Professor: cellular (T-cell) parameters is that the vaccine is now ideal to raise the immunity and humoral (antibody) immune response two -



Experts T cells corona 19 Amerindians Of course, it is expected that it could be a variable that determines quarantine policy.



(Video coverage: Kim Hak-mo, Video editing: Jeon Min-gyu)