Epidemiological Characteristics of Hepatitis a Infection in the Pre-Vaccination and Vaccination Periods

Abstract

Abstract. The hepatitis A has important social and economic significance in the Russian Federation now. The analysis of multiyear dynamics of hepatitis A incidence in the regional center — Perm city has been carried out. It was established that vaccination of children against hepatitis A within the different institutions influenced on the intensity of epidemic process. The hepatitis A incidence rates significantly decreased in the vaccinated groups and in the whole population. The typical seasonal distribution of cases and their clustering became less manifested.