M.K. ISCHACOVA1, N.I. PENKINA1, M.A. IVANOVA2 1Izhevsk State Medical Academy, Izhevsk 2Russian Research Institute of Health, Moscow Contact details: Penkina N.I. — MD, Professor, Department of Pediatrics and Neonatology Address: 281 Kommunarov St., 426034 Izhevsk, Russian Federation, tel.: +7 (3412) 65-81-67, e-mail: nad.penkina@yandex.ru  Social-hygienic and medical-biological factors are significant in the formation of an adequate immune response […]