A study published in the journal Immunology suggests that neutralizing antibodies – antibodies that bind to the virus and interfere with its ability to infect a cell and are part of humoral immunity – may remain at least five to seven months after Covid infection.
“The neutralizing antibodies and those against RBD and S2 reached a stable soil and persisted for at least 7 months after the expected decline,” concludes the study, signed by a group of researchers from the University of Arizona.
“Levels of neutralizing antibodies remained high with very low decay in relation to time in all but one subject “of a sample of 6,000 people.
Among other salient findings, the research found that “the severity of the disease, but not age or sex, correlates with the magnitude of the response [inmune]”.” Contrary to expectations, we did not observe any adverse impact of advanced age on humoral immunity. Similarly, within our cohort, women and men had similar anti-RBD, N, S and neutralizing antibody responses “, the text continues.
The research findings also point against other studies that spoke of a rapid loss of immunity to SARS-nCov-2. “Conclusions on the rapid loss of immunity to SARS-nCov-2 they are premature and inconsistent with the data we present here. In fact, in approximately 30 million cases between December 2019 to date, there have only been about 10 documented cases of reinfection, “they explain.
“These data suggest that resistance to reinfection may be less a function of the durability of the immune response and more of the amplitude,” they conclude.