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ZYGMUNT, Anna Ewa, KAROŃ, Łukasz, KAROŃ, Karolina, GRABOWSKI, Wojciech, PEDRYCZ, Daria, DRAPAŁA, Grzegorz and PEDRYCZ, Emilia. A Natural Way Of Boosting Immunity: The Role of Echinacea in Cold Prevention and Treatment - A Literature Review. Quality in Sport. Online. 26 October 2024. Vol. 29, p. 55670. [Accessed 29 June 2025]. DOI 10.12775/QS.2024.29.55670.