Introduction:

vaccination has proven to be effective in reducing infectious disease, but vaccination rates are not always adequate to prevent the outbreak of cases of vaccine-preventable diseases. There may be several reasons and need to be known to make effective interventions.

Objectives:

to determine the prevalence and reasons for delay in vaccinations in children from a low income area to different vaccines.

Materials and methods:

descriptive cross sectional study. Survey and registration vaccine was made in april 2015. Delay was considered more than 30 days of the application of the biologic the due date of vaccination.

Results:

150 children were included. Average age 2.4 years (1-5), 68% with regular health check ours (150/102). Delays in global vaccination was 16%. The vaccines with gratties were more frecuent in children 18 months and 4 years old in 51% (37/19). For TDP the average was 95 days: OPV 92, AA 113 days, SPR 63 days, the more affected biologic was OPV with 63% of delay the predominant reasons were false contraindications, diseases diagnosed by physicians and loss of ID (Identity card).

Conclusion:

the delay the vaccine delay is a reality. More efforts are needed to improve methods to identify areas with low immunization coverage so that resources can be directed to places where interventions are needed.

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