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About a third of those treated with COVID-19 are left with very few antibodies against the virus, making them vulnerable to reinfection and can spread the disease again. This is indicated by recent studies by scientists at Fu-tan University in Shanghai, China, led by Professor Huang Jinghe, cited by the Czech site lidovky.cz.
According to the researchers, this means that the principle of collective immunity, which must stop the progression of the epidemic, may not work for the new coronavirus. “Our findings are clinical observations from the front. Data from other parts of the world will also be needed to draw conclusions,” Jinghe emphasizes. The study was published in a temporary database but has not yet been reviewed, the website says.
Information on people who have recovered from COVID-19 and recovered in a few weeks does not come from China. However, it is not always clear if his recovery is proven with absolute certainty, because the external symptoms of the disease disappear, but the viruses continue to circulate in the body.
This study at the University of Fu-tan works with 175 patients recovered from COVID-19. Among them, 10 did not detect antibodies at a later date, and in the other 42, the levels of antibodies in their blood were so low that doctors were skeptical about whether these values would provide them with additional protection in a new virus attack. Another thing is that it is not yet possible for the new coronavirus to say with certainty what proportion of antibodies is low and which is sufficient, according to the electronic edition.
According to published Chinese studies, youth in the 15-39 age group had the lowest levels of antibodies. Compared to these, people in the 60-85 age group had triple the level of antibodies in their blood.
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