[Evaluation of seroconversion after voluntary vaccination against hepatitis B in students at the University of Lodz].

We have evaluated the results of the first action of voluntary vaccination against hepatitis B in the students of Medical University of Lódź using Energix-B vaccine (20 micrograms) in schedule 0, 1, 6 months. Few students applied for the vaccination: only 48.4% of persons planned for vaccination completed the schedule. Seroconversion rate (anti-HBs > 10u/l) in this group was 93.9%. Three doses of vaccine applied inconsistently with schedule resulted in the immunological response in 3 out of 4 students observed. Two doses of vaccine resulted in the effective response in 13 out of 16 students observed. One doses of vaccine proved to be ineffective. The blood tests performed prior to vaccination showed the presence of the HBV markers in 9.6% of students (HBsAg in 2.1% of persons and anti-HBs in 5.3/of persons).