In Poland 34 measles cases were registered in 2002 (0.09 per 100,000 population)--99 cases less than in the preceding year. Eleven (32%) cases occurred in unvaccinated persons, 9 (27%) in persons who had received only one dose of the vaccine and 14 (41%) in those vaccinated with two doses. The number of cases among the vaccinated population--23, including one case of vaccine associated measles--together with high vaccination coverage after 1975, indicates high effectiveness of measles vaccines used in Poland. Fifteen cases (44%) were confirmed serologically (IgM). Across the voivodeships the number of cases ranged from 0 in four voivodeships to 5 in the ślaskie voivodeship. In none of the voivodeships, however, did the incidence exceed 0.2 per 100,000. The most affected were infants (incidence 0.85 per 100,000), children in their second year of life (incidence 1.09) and children aged 5 and 6 years--incidence of 0.72 and 0.69 respectively. According to the immunization schedule these were children who should receive their first or subsequent dose of vaccine during the year 2002. Cases among children and adolescents below 15 years of age (26 cases) constituted 77% of all reported cases. Out of all reported cases 13 (38%) were hospitalized. There were no deaths due to measles in Poland in 2002.