Researchers in the United States and Switzerland have found that human memory B cells can “remember” the virus for at least half a year after being infected with the new coronavirus, and may “quickly and effectively” make the body produce antibodies when re-infected.
Agence France-Presse reported on the 18th that researchers reached the above conclusions after evaluating the response of 87 new coronavirus-infected memory B cells to the virus. The evaluation nodes are about 1 month and 6 months after the infection is confirmed.
The researchers found that although the neutralizing antibody activity in the human body against the virus decreases over time, the number of memory B cells remains unchanged. Neutralizing antibodies are antibodies produced when pathogens invade the human body. They said that when virus proteins remain in the body, memory B cells gradually evolve their response to the virus in 6 months, allowing the body to produce stronger antibodies.
This finding shows that “people who have been infected with the new coronavirus may respond quickly and effectively to the virus when they are infected again.”
Memory B cells are B lymphocytes that retain information about pathogens previously infected by the body.
The researchers said: “The memory response is responsible for providing protection when re-infected with the virus and plays an important role in effective vaccination.”
The research report was published on the website of Nature magazine on the 18th, but it has not yet been edited.