Introduction: since June 2010 the Community of Madrid included in the childhood vaccination schedule the conjugate vaccine against thirteen pneumococcal serotypes. By budgetary reasons, it was withdrawn from the financing public system in July 2012 to March 2015. Our goal was to evaluate how it influenced vaccination coverage and the incidence of acute otitis media, pneumonia and invasive pneumococcal disease in a low-income population, and compare them with published data for the whole region.
Methods and materials: retrospective cohort study of pneumococcal disease and vaccination rate in children born between May 2012 and October 2014, who are patients in the Health Center of Entrevías.
Results: there has been a reduction in the vaccination coverage (66 %, 95% CI: 57.3 to 71.4%) compared to the average of the Community of Madrid (77%). There were no cases of invasive pneumococcal disease, and the incidence of pneumonia and acute otitis media was independent of immunization status. The only factor associated to the incidence of acute otitis was the attendance to daycare center.
Conclusions: the defunding of the conjugate vaccine against thirteen pneumococcal serotypes caused a decrease of vaccination coverage in children a low-income population. In this study we found no increased incidence of pneumococcal disease, a fact that may be due to the persistence of the herd effect or to an insufficient sample size.
Keywords: Pneumococcal vaccines. Otitis media. Pneumonia, pneumococcal. Pneumococcal infections. Immunization coverage.