The epizootic situation of avian influenza in the Kaluga region D.M. Evstafyev, P.V. Dudin, T.A. Spasskaya, A.Ya. Bondarev and E.A. Vodolazov BIO Web Conf., 108 (2024) 03006 Published online: 15 May 2024 DOI: 10.1051/bioconf/202410803006