[1]
K. Ruszel and H. Piecewicz-Szczęsna, “Are we still afraid of influenza during the Sars-Cov2 pandemic? - epidemiological analysis of influenza morbidity and vaccination in the 2019/2020 season”, J Educ Health Sport, vol. 10, no. 8, pp. 22–31, Jul. 2020.