Abstract
Engerix B vaccine was administered to 54 children with leukemias and lymphomas aged from 2 to 15 years. In 36 cases chemotherapy was completely stopped, and 18 cases were receiving maintenance treatment. Engerix B was given at 0, 1, 2 and 6 months in a dose of 20 micrograms to children < 10 years, and 40 micrograms to older patients. The effectiveness of active immunization was demonstrated after complete therapy cessation in 88% of cases. The levels of antibodies determined 1 year after primary vaccination remained high, and in most of the vaccinated children they were > 1000 mIU/mL. In children vaccinated in the course of maintenance treatment the levels of antibodies did not give sufficient protection against infection.
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