In vivo expression of Neisseria meningitidis proteins homologous to the Haemophilus influenzae Hap and Hia autotransporters
Antibody response to Haemophilus influenzae type b vaccine in relation to the number of CD4+ T lymphocytes in adults infected with human immunodeficiency virus
Effect of nationwide vaccination of 3-month-old infants in the Netherlands with conjugate Haemophilus influenzae type b vaccine: high efficacy and lack of herd immunity
A competitive enzyme-linked immunosorbent assay for measuring the levels of serum antibody to Haemophilus influenzae type b
Evaluation of the national immunisation programme in the Netherlands: immunity to diphtheria, tetanus, poliomyelitis, measles, mumps, rubella and Haemophilus influenzae type b
A comparison of ELISA methods for the determination of human serum antibodies to Haemophilus influenzae type b