Meningococcal disease occurs with an incidence of 0,2 to 14 per 100 000 population in industrialized countries. Effective vaccines based on capsular polysaccharides for meningococcal serogroups A, C, W-135, and Y are available, but serogroup B capsular polysaccharide is antigenically similar to human neurol cell glycopeptides containig polysialic acid and poorly immunogenic in humans.