The immune system remembers Corona at least 6 months


An American study added new evidence regarding the duration of immunity conferred by infection with the “emerging corona” virus. Previous research caused concern by showing that neutralizing antibodies can rapidly decline after infection with the virus, but recent studies have highlighted the role of other parts of the immune system in achieving long-term immunity, which are memory B cells.

One of the research papers published in the journal Science this month suggested that nearly all of the major parts of the immune system that can learn to recognize and repel new pathogens could continue to respond to the virus for at least 8 months, and this included the protein’s memory B cells. Which researchers found that it had already increased in the blood 6 months after infection, and the paper was based on the analysis of blood samples from 188 patients with “Covid-19” virus.

The study, which was published the day before yesterday, in the journal “Nature”, added new evidence, during which the researchers went to the effect that people may be able to fight infection again for at least 6 months after they recover from “Covid-19” disease, thanks to the cells that She can remember it.

The researchers, led by a team from the Rockefeller University in America, studied dozens of people who had recovered from “Covid-19”, and found that the antibodies wiped from their bodies over time, but they maintained levels of specific memory B cells.

These cells can remember the pathogen and can, if they encounter the infection again, stimulate the immune system to reproduce the antibodies that fight the virus.

The study concluded that “memory responses are responsible for protecting against reinfection and are necessary for effective vaccination.”

During the study, researchers evaluated 87 people who recovered from “Covid-19” after a period of just over a month and 6 months after infection.

While they found that the activity of neutralizing antibodies decreased over time, the number of memory B cells remained unchanged.

The researchers say that their study indicated that the response of memory B cells against the Corona virus develops during the six months following the infection in the presence of viral residue proteins in the body, which enables the cells to produce more effective antibodies.

For his part, Dr. Khaled Abdel-Wahab, a professor of viruses at the Egyptian South Valley University, describes the study’s finding as extremely important.

He says to Asharq Al-Awsat: “Predicting the dynamics of the epidemic needs to know information such as how long people can resist infection again with the new coronavirus, and what the immune process it entails, and this information was answered by the study.”

He adds that there is a need to conduct a more comprehensive study that includes a larger number of respondents, because the number covered in the study is very small.


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