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[Pentavalent vaccine and vaccination coverage in children aged less than one in Colombia 2000-2003]
Jaid C Rojas-Sotelo1, Franklyn E Prieto-Alvarado
1Ministerio de la Protección Social. jaidrojas@yahoo.com
Insights
The pentavalent vaccine significantly improved childhood immunisation coverage, increasing the number of municipalities reaching 80% coverage. Continued financing is crucial for sustaining vaccination programs and developing new combination vaccines.
Area of Science:
- Public Health
- Vaccinology
- Epidemiology
Background:
- Childhood immunisation is critical for disease prevention.
- Assessing the impact of new vaccine introductions on coverage rates is essential for public health policy.
Purpose of the Study:
- To determine the impact of introducing the pentavalent vaccine on third-dose immunisation coverage in children under one year.
- To analyze changes in coverage by geographic cluster.
Main Methods:
- An ecological study design was employed.
- Data were analyzed using administrative units (department, province, municipality, capital city).
- Third-dose coverage, desertion index, and the number of municipalities achieving >80% coverage were compared pre- and post-vaccine introduction.
Main Results:
- Overall immunisation coverage increased from 23% to 26%, with notable gains for Haemophilus influenzae type b (Hib3).
- The desertion index decreased significantly from 9.3-31.7% to 0.3%.
- The number of municipalities with >80% coverage more than doubled, from 265 to 627.
Conclusions:
- The pentavalent vaccine introduction positively impacted immunisation coverage rates.
- Sustained financing is recommended to ensure vaccine availability and support research into new combination vaccines.
Objective:
Determining the impact of including pentavalent vaccine in third-dose immunisation coverage for children aged less than 1 (2002 and 2003) by geographic cluster.
Materials And Methods:
This was an ecologic study using department, province, municipality and capital city as analysis units. It compared third-dose coverage, desertion index, number of places having more than 80% immunisation coverage and the number of children being immunised before and after vaccination was introduced. Having more than 80% immunisation coverage was compared to the number of children or places having unsatisfied basic needs, the presence of armed conflict or municipal category.
Results:
Immunisation coverage increased from 23% to 26%, mainly for Hib3. Desertion index was 9.3-31.7% in 2000 and 0.3% in 2003. The number of municipalities having more than 80% immunisation coverage increased from 265 in 2000 to 627 in 2003. 462,000-584,000 third-doses were applied in 2000 and 805,000-813,000 in 2003. More municipalities having more than 80% coverage had high unsatisfied basic needs, low socioeconomic income or conflict.
Conclusions:
The introduction of the vaccine affected immunisation coverage. Financing should be sought for the vaccine to ensure its continuity and to implement studies for new vaccines or introducing combination vaccines.
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