Almost all Cameroonian and Senegalese children had been vaccinated (with partial or complete vaccination) (99% and 1000 %, respectively), exceeding that of CAR (49%%).
Since these students will have a major role in providing health care services in both in-patient and out-patient medical centres in the near future, it is of high priority to perform complete vaccination programs through acellular pertussis vaccines.
Combination vaccines reduce the number of injections required to complete vaccination, thus playing an important role in maintaining high vaccine coverage with good public acceptability.
Combination vaccines reduce the number of injections required to complete vaccination, minimize clinic visits and reduce costs associated with vaccine transport and storage.
Vaccination coverage was defined according to three individual vaccines: tetanus, influenza and pneumococcal, and for complete vaccination schedule.
Although the vaccine use increased from 2002 onwards, the reported vaccine coverage in 2006 was below 50% (assuming complete vaccination schedules) [ 10].
New mechanisms for obtaining complete vaccination histories, such as interviewing case-patients and contacting vaccine providers to verify self-reported vaccination, are being explored.
In general, the estimate of the Oportunidades effect does not show great variations, and in all cases it is highly significant for complete vaccination schedule and for each of the three individual vaccines.
We have observed that samples from healthy individuals in a country with almost complete vaccination coverage and even from individuals who have never been vaccinated may exhibit immune reactivities to HBHA, indicating that natural immunization to this protein or to cross-reactive peptides may occur.
Out of 53 patients, 21 (39.6%) were partially vaccinated or unvaccinated at all and 32 (60.4%) received complete vaccination.
Complete vaccination was defined as receiving the three-dose series of HBV vaccines, incomplete vaccination was defined as receiving either one or two doses, and non-vaccinated was defined as having never been vaccinated against HBV.
