Czarnota, Jakub, Tomasz Skubel, Michał Dobrzyński, Dorota Sokół, Arkadiusz Standyło, and Halina Piecewicz-Szczęsna. 2019. “The Correllation Between Incidence Rate of Pertussis and Vaccination Rate of Children from 1998 to 2016 in Poland”. Journal of Education, Health and Sport 9 (6):491-95. https://apcz.umk.pl/JEHS/article/view/7069.