KUJAWA, Aleksandra, MATUSZEWSKA, Urszula, NYKOWSKA, Aleksandra, BEUTLER, Katarzyna, BIJATA, Bartosz, BUREK, Dawid and PASZKOWSKA, Aleksandra. The impact of physical activity on the risk and severity of COVID-19 infection. Journal of Education, Health and Sport. Online. 11 January 2024. Vol. 52, pp. 38-56. [Accessed 17 July 2024]. DOI 10.12775/JEHS.2024.52.003.