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Is vaccination coverage a good indicator of age-appropriate vaccination? A prospective study from Uganda

, : Is vaccination coverage a good indicator of age-appropriate vaccination? A prospective study from Uganda. Vaccine 29(19): 3564-3570

Timely vaccination is important to protect children from common infectious diseases. We assessed vaccination timeliness and vaccination coverage as well as coverage of vitamin A supplementation in a Ugandan setting. This study used vaccination information gathered during a cluster-randomized trial promoting exclusive breastfeeding in Eastern Uganda between 2006 and 2008 ( no. NCT00397150). Five visits were carried out from birth up to 2 years of age (median follow-up time 1.5 years), and 765 children were included in the analysis. We used Kaplan-Meier time-to-event analysis to describe vaccination coverage and timeliness. Vaccination coverage at the end of follow-up was above 90% for all vaccines assessed individually that were part of the Expanded Program on Immunization (EPI), except for the measles vaccine which had 80% coverage (95%CI 76-83). In total, 75% (95%CI 71-79) had received all the recommended vaccines at the end of follow-up. Timely vaccination according to the recommendations of the Ugandan EPI was less common, ranging from 56% for the measles vaccine (95%CI 54-57) to 89% for the Bacillus Calmette-Guérin (BCG) vaccine (95%CI 86-91). Only 18% of the children received all vaccines within the recommended time ranges (95%CI 15-22). The children of mothers with higher education had more timely vaccination. The coverage for vitamin A supplementation at end of follow-up was 84% (95%CI 81-87). Vaccination coverage was reasonably high, but often not timely. Many children were unprotected for several months despite being vaccinated at the end of follow-up. There is a need for continued efforts to optimise vaccination timeliness.


PMID: 21402043

DOI: 10.1016/j.vaccine.2011.02.093

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