The impact of physical exertion and man-made environmental factors on lymphoid organsElena Oleynik, Elena Kokorina, Irina Krasnoruckaya, Ekaterina Petrenko and Аltyn DyusenovaE3S Web Conf., 460 (2023) 11010DOI: https://doi.org/10.1051/e3sconf/202346011010