G.F. LEONOVA, I.M. KHAERTYNOVA, O.G. LAZARENKO, V.G. SHAKIROVA Kazan State Medical Academy, 11 Mushtari St, Kazan, Russian Federation, 420012  Leonova G.F. — Assistant Lecturer of the Department of Infectious Diseases, tel. (843) 267-80-95, e-mail: gul-mir@mail.ru Khaertynova I.M. — D. Med. Sc., Professor, Head of the Department of Infectious Diseases, tel. (843) 267-80-95, e-mail: i.khaertynova@mail.com Lazarenko O.G. — Cand. Med. Sc., […]