M. I. Gritsay
Central Research Institute of Epidemiology
Russian Federation

Maria I. Gritsay – postgraduate student at the Laboratory of the Epidemiology of Meningococcal Infection and Bacterial Meningitis

st. Novogireevskaya, 3a, Moscow 111123

M. A. Koroleva
Central Research Institute of Epidemiology
Russian Federation

Maria A. Koroleva – Cand. Sci. (Med.), senior researcher at the Laboratory of the Epidemiology of Meningococcal Infection and Bacterial Meningitis

st. Novogireevskaya, 3a, Moscow 111123

N. N. Fomkina
Direction of the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing
Russian Federation

Nona N. Fomkina – Head of the Department of Epidemiological Surveillance of the Office

Grafsky Lane, 4, building. 2, Moscow 129626

I. S. Koroleva
Central Research Institute of Epidemiology
Russian Federation

Irina S. Koroleva – Dr. Sci. (Med.), Head of the Laboratory of the Epidemiology of Meningococcal Infection and Bacterial Meningitis

st. Novogireevskaya, 3a, Moscow 111123