Aged 7-14 Years Old in Denizli, Turkey

Objective. To determine the pre-campaign level of measles seropositivity and to evaluate the effect of a mass measles vaccination campaign on measles seroposivity among primary school children in Denizli, Turkey.Methods. The study was completed in two socioeconomically different areas of Denizli, Turkey, with a sample size of 520 students. One primary school from each area and one classroom from each grade were randomly included in the sample. Before and 2-months after the measles mass vaccinations, blood samples were collected from the students and measles specific IgGs were studied.Results. The pre-campaign overall seropositivity was 74.7%. Post-campaign overall seropositivity increased to 96.5%. Pre-campaign seropositivity among 8-graders was significantly lower than that in other grades (57.5%, p