Mild COVID 19 Antibodies may be everlasting
This looks like great news that COVID 19 antibodies may last forever. A research published on May 24 in the American journal Nature, at Washington University School of Medicine in St. Louis indicates that mild Covid 19 induces lasting antibodies. This means repeat bouts of the disease will be uncommon and rare.
During any viral infection, the body produces antibodies and sends them to the bloodstream to fight the virus. This elevates the level of antibodies in the blood. Once the infection is controlled, most of these cells die off. This leads to a drop in the level of antibodies in the blood. But some antibody-producing cells go to the bone marrow and stays there. Here they keep releasing the antibodies to counter another virus attack. They keep doing this forever, believes Ali Ellebedy, Ph.D., an associate professor of pathology & immunology, of medicine, and of molecular microbiology.
Ellebedy and his associates took bone marrow from 18 of the participants, post 7-8 months of their initial infections. Five of them came back four months later and provided a second bone marrow sample. Just to compare, this group of researchers also took bone marrow from 11 people who never had COVID-19.
The level of COVID 19 Antibodies in the blood of the infected participants dropped quickly in the first few months post-infection and then plateaued, with some antibodies detectable even after a year of the infection. On the contrary, no antibodies, in the bonemarrow, were detected in all 11 people who never had the COVID19.
Though this research may need further investigations and more sampling, no doubt this is quite a decent indication and a great hope. The researchers are also studying if the antibodies produced by vaccination also last forever.