Changes in seroprevalence and acute infection rates after vaccination and herd immunity in a pediatric hospital in the Southeastern Anatolia region of Turkey: Effects of adding hepatitis a vaccine to the Extended National Immunization Progra. Ann Med Res . 2021;27(3):0743-0748. Accessed April 4, 2025. http://annalsmedres.org/index.php/aomr/article/view/683