An October 3, 2021 study in the peer-reviewed journal BioRxiv by Stanford and Emory University scientists suggests that antibody levels generated by the Pfizer-BioNTech vaccine can suffer a ten-fold decrease seven months after the second vaccination.93 The scientists warn that the precipitous drop in antibody levels will compromise the body’s ability to defend itself against COVID-19 if the individual is exposed to COVID.
