A. Yu. Ulitina
Samara State Medical University
Russian Federation

Alina Yu. Ulitina, Assistant Professor, Department of Infectious Diseases and Epidemiology 
Author's contribution: data collection, analysis, and processing.

Chapaevskaya St., 89, Samara, 443099

D. Yu. Konstantinov
Samara State Medical University
Russian Federation

Dmitriy Yu. Konstantinov, Dr. Sci. (Med.), Docent, Head of the Department of Infectious Diseases with Epidemiology 
Author contributions: study concept development, data analysis.

Chapaevskaya St., 89, Samara, 443099

L. L. Popova
Samara State Medical University
Russian Federation

Larisa L. Popova, Dr. Sci. (Med.), Professor, Department of Infectious Diseases with Epidemiology 
Author's contributions: trend analysis, definition of research principles.

Chapaevskaya St., 89, Samara, 443099

M. F. Ivanov
Samara State Medical University
Russian Federation

Mikhail F. Ivanov, Dr. Sci. (Med.), Docent, Head of the Department of General and Clinical Pathology: Pathological Anatomy and Pathological Physiology 
Author contributions: literature review, discussion.

Chapaevskaya St., 89, Samara, 443099