Childhood vaccine coverage in Italy after the new law on mandatory immunization

Background. The Italian National Immunization Prevention Plan (PNPV) identifies vaccines actively offered free of charge to target populations within the National Health Service. Despite this, childhood immunization coverage has been declining in Italy in recent years. As a response, the Italian Parliament in July 2017 approved law n. 119 extending mandatory childhood vaccines from four to ten, this stimulating a lively debate at both the scientific and policy level. Methods. We analysed and critically interpreted 2000-2017 Italian national childhood immunization coverage trends, by different vaccine, target population, birth cohort and by Region. In particular, in order to preliminarily assess the impact of the new law, we computed percentage changes in 2016-2017 vaccine coverage for both mandatory and recommended vaccine programs. Data were provided by the Directorate General of Health Prevention of the Italian Ministry of Health. Results. In 2017 national-level vaccine coverage at 24 months of age was 94.5% for Polio and 91.7% for Measles, this representing, respectively 1.2% and 4.4% increase, as compared to 2016. Conjugate Pneumococcal and Meningococcal C vaccines coverage increased, respectively, by +2.5% and +2.4% between 2016 and 2017. National-level polio vaccine coverage remained above the 95% PNPV coverage target between 2000 and 2013 and has remained below since then. In particular, it has had been steadily declining between 2011 and 2016 (-2.8%). Measles coverage remained well below the 95% coverage target for the entire study period. In recent times, it declined by 4.8% between 2011 and 2015 with the lowest coverage rate reported for year 2015 (85.3%). There is high heterogeneity in coverage within Regions for both mandatory and recommended vaccines. Conclusion. Preliminary data show that childhood immunization coverage increased since the approval of the new law on mandatory vaccination. Nonetheless, as additional data are accumulating and will make it possible to further assess the impact of the new law, strengthened efforts are needed in Italy to promote informed and proactive vaccine uptake.