 This research paper examined the correlation between vaccinations and protection against COVID-19. It found that people who had been vaccinated with the Pfizer BNT162B2 vaccine were less likely to become infected with the virus if they also had higher levels of antibodies and neutralizing antibodies. Additionally, it was discovered that certain individuals were more vulnerable to infection even after receiving the vaccine due to lower levels of antibodies. This suggests that further research should be done to determine how best to protect these individuals from future infections. This article was authored by Toma Hertz, Shlomi Alevi, Daniel Ostrowski, and others.