In response to the described clusters of measles cases, active tracing and vaccination of susceptible contacts was performed by local health authorities. A second dose of MMR vaccine was also offered to incompletely vaccinated contacts. In addition, MMR vaccine was offered to all susceptible or incompletely vaccinated children and adolescents attending any of the schools in which cases had been detected and to Roma/Sinti children up to 5 years of age. Vaccination sessions were conducted directly in the involved settlements; in total 493 persons in seven settlements were vaccinated in August 2006. Isolation of cases and susceptible contacts (in hospital for Roma/Sinti patients and at home for other subjects) was recommended, Local health authorities were urged to identify possible contacts of all suspected measles cases, and alert general practitioners, family paediatricians, and hospitals about the outbreaks. Physicians were asked to report cases within 24 hours of diagnosis. In addition, guidelines regarding respiratory isolation of patients with suspected measles, and vaccination of susceptible hospital staff were forwarded to all hospitals of the region. Before the start of the 2006/07 school year a meeting was organized by the ASP with staff in charge of the measles elimination campaign and the public health departments of the 12 health authorities. Local media were also informed of the outbreaks.