Universal varicella vaccination in the Veneto Region, Italy: launch of a programme targeting all children aged 14 months and susceptible adolescents Baldo, V and Ferro, A and Napoletano, G and Milani, S and Bertoncello, L and Baldovin, T and Trivello, R, Weekly releases (1997–2007), 12, 3299 (2007), https://doi.org/10.2807/esw.12.44.03299-en