RUSZEL, K.; PIECEWICZ-SZCZĘSNA, H. Are we still afraid of influenza during the Sars-Cov2 pandemic? - epidemiological analysis of influenza morbidity and vaccination in the 2019/2020 season. Journal of Education, Health and Sport, [S. l.], v. 10, n. 8, p. 22–31, 2020. DOI: 10.12775/JEHS.2020.10.08.003. Disponível em: https://apcz.umk.pl/JEHS/article/view/JEHS.2020.10.08.003. Acesso em: 27 jan. 2023.