We investigated the effectiveness of different COVID-19 vaccinations administered in Pakistan by studying the effect of inactivated virus, mRNA and vector formulations. This study in 916 participants was conducted between October 2021 and July 2022. Subjects receiving inactivated (A), mRNA (B), one-dose vector (C), and two-dose vector (D) vaccines were sampled at baseline, 6, 12, and 24 weeks. Serum IgG antibod...