Błaszczyszyn, Katarzyna, Monika Bolek, Katarzyna Muc, Natalia Hopej, Krzysztof Dobrzeniecki, and Kacper Turek. “The Pertussis Paradox: Why Are Cases Increasing Despite Vaccination Efforts?”. Quality in Sport 16 (July 11, 2024): 52583. Accessed July 18, 2024. https://apcz.umk.pl/QS/article/view/52583.