Authors described modern epidemiological peculiarities of hepatitis A in Russia. They prove reasonability of mass vaccination implementation against this infection. Results of a vaccination in children after its inclusion in Regional Calendars of Prophylactic Immunization are analyzed.Key words: children, hepatitis A, vaccinal prophylaxis, posvaccinal immunity. (Voprosy sovremennoi pediatrii — Current Pediatrics. – 2010;9(3):131-135