Universal varicella vaccination in the Sicilian paediatric population: rapid uptake of the vaccination programme and morbidity trends over five years Giammanco , G and Ciriminna, S and Barberi, I and Titone, L and Lo Giudice, M and Biasio, L R, Eurosurveillance, 14, 19321 (2009), https://doi.org/10.2807/ese.14.35.19321-en