Maeda H, Saito N, Igarashi A, Ishida M, et al. Effectiveness of mRNA COVID-19 vaccines against symptomatic SARS-CoV-2 infections during the Delta variant epidemic in Japan: Vaccine Effectiveness Real-time Surveillance for SARS-CoV-2 (VERSUS). Clin Infect Dis 2022 Apr 19. pii: 6570603. doi: 10.1093.
PMID: 35438137