Varicella vaccinations (2
dose), average per month and practice. Stacked bars show proportion of monovalent varicella vaccine (black, n = 17,380) and of tetravalent MMR-V vaccine (grey, n = 23,161). The arrow indicates the change to a two-dose schedule for all licensed varicella vaccines. Data from BaVariPro, practice surveillance Oct 2006- Sep 2011.