I.E. KRAVCHENKO1, Ch.Ch. EMENE2, A.A. RIZVANOV2 1Kazan State Medical University of the Ministry of Health of the Russian Federation, Kazan 2Kazan (Volga) Federal University, Kazan Contact: Kravchenko I.E. ― MD, Professor of the Department of Infectious Diseases Address: 49 Butlerov Str., Kazan, Russian Federation, 420012, tel. +7-906-320-16-86, e-mail: [email protected] The aim is to study the […]