A cross-sectional study on vaccine coverage and seroprevalence in schoolchildren in Andorra

A cross-sectional study on vaccine coverage and vaccine effectivenes was carried out on a randomized sample of the cohort of schoolchildren born in 1983 attending school in Andorra, prior to the introduction of a Systematic Immunisation Plan that included centralised import and delivery of vaccines to vaccinating clinics, surveillance of the cold-chain during vaccine delivery, and a clearly defined immunization schedule against diphtheria, tetanus, pertussis, polio, mumps, rubella and measles.