| positive effect of the introduction of haemophilus influenzae type b vaccination in the expanded program on immunization in cameroon. | the microbiological surveillance of acute bacterial meningitis in the three northern provinces of cameroon, namely north, far north and adamaoua shows the disappearance of hib from cerebrospinal fluid specimens examined in the laboratory of the centre pasteur, in garoua, using culture and/or soluble antigen testing, since the hib immunization introduction on 1 february 2009. | 2010 | 20674879 |