M. A. Koroleva
Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being
Russian Federation

Maria A. Koroleva – Dr. Sci. (Med.), senior researcher at the laboratory of the epidemiology of meningococcal infection and bacterial meningitis

3a, st. Novogireevskaya, Moscow, 111123

M. I. Gritsay
Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being
Russian Federation

Maria I. Gritsay – Cand. Sci. (Med.), researcher at the laboratory of the epidemiology of meningococcal infection and bacterial meningitis

3a, st. Novogireevskaya, Moscow, 111123

N. S. Churilova
Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being
Russian Federation

Nadezda S. Churilova – graduate student at the laboratory of the epidemiology of meningococcal infection and bacterial meningitis

3a, st. Novogireevskaya, Moscow, 111123

I. S. Koroleva
Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being
Russian Federation

Irina S. Koroleva – Dr. Sci. (Med.), Head of the Laboratory epidemiology of meningococcal infection and bacterial meningitis

3a, st. Novogireevskaya, Moscow, 111123