“Although this NIH report is from 01/26/21 the results are just as pertinent today as then. Even though the antibodies may experience a decline over time the B cells can crank out more any time they’re needed. It appears the study only lasted 8 months so this immunity may last much longer than that. They hoped that the immunity from the vaccines might do as well but we now know that’s not the case and their immunity wanes rather quickly as soon as another variant becomes dominant. This indicates to me natural immunity is indeed best.” Admin
After people recover from infection with a virus, the immune system retains a memory of it. Immune cells and proteins that circulate in the body can recognize and kill the pathogen if it’s encountered again, protecting against disease and reducing illness severity.
This long-term immune protection involves several components. Antibodies—proteins that circulate in the blood—recognize foreign substances like viruses and neutralize them. Different types of T cells help recognize and kill pathogens. B cells make new antibodies when the body needs them.
All of these immune-system components have been found in people who recover from SARS-CoV-2, the virus that causes COVID-19. But the details of this immune response and how long it lasts after infection have been unclear. Scattered reports of reinfection with SARS-CoV-2 have raised concerns that the immune response to the virus might not be durable.
To better understand immune memory of SARS-CoV-2, researchers led by Drs. Daniela Weiskopf, Alessandro Sette, and Shane Crotty from the La Jolla Institute for Immunology analyzed immune cells and antibodies from almost 200 people who had been exposed to SARS-CoV-2 and recovered.
Read More: Lasting immunity found after recovery from COVID-19 | National Institutes of Health (NIH)
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