Overall, the median age of cases was 11 years. Children aged 0-4 years were the most affected age group, with one third (152/449) of cases reported belonging to this age group (76/100,000 incidence for children <5 years). Measles incidence in the total population during the two outbreaks was 9/100,000. When analysed separately, the age distribution of measles cases was different among the Roma/Sinti population (median age two years) with respect to the rest of the population (median age 15 years). Seventy percent (72/102) of Roma/Sinti cases occurred in children aged 0-4 years and over 90% (93/ 102) were aged below 15 years. The age distribution of cases in the Italian ethnic population was more evenly distributed among all age groups. Only 23% of cases (80/ 347) were aged 0-4 years, and less than 50% (170/347) occurred in children below 15 years of age ( Figure 3 ).