Boosters slow antibody waning but hit a ceiling: Long-term COVID study reveals limits of immunity
The study tracks the long-term kinetics of antibody responses to SARS-CoV-2 after vaccination and infections in New York healthcare workers from 2020 to 2023. It reveals that antibody waning is slower after booster shots, but there's an upper limit to antibody levels, which gradually lowers with repeated SARS-CoV-2 exposures and vaccinations.