Immunity To COVID-19 Could Last Longer Than You'd Think
So, how long does immunity last after two doses of the vaccine and how much protection is left over time? A series of new studies suggest that mRNA vaccines like those from Pfizer-BioNTech and Moderna trigger the immune system to establish long-term protection against severe COVID-19 — protection that likely will last several years or even longer. The media has largely focused on this decline of antibodies as the cause of "waning immunity." And it's true, says Dr. Deepta Bhattacharya, that this decline in antibodies, combined with the high potency of the delta variant, which began dominating many countries this year, is likely increasing the rate of infection in fully vaccinated people. But the level of breakthrough infections is probably not as dramatic as it's being made out to be.