Yis, R. and Sait Yildirim, M. 2021. 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. Annals of Medical Research. 27, 3 (May 2021), 0743–0748.