Varicella vaccinations (1
dose), average per month and practice. Stacked bars show proportion of monovalent varicella vaccine (black, n = 22,517) and of tetravalent MMR-V vaccine (grey, n = 27,532). The arrow indicates the change to a two-dose schedule for all licensed varicella vaccines. Data from BaVariPro, practice surveillance Oct 2006-Sep 2011.