[Subacute sclerosing panencephalitis (SSPE) in Poland in the years 1993-1995. The sixth stage of epidemiological research].

Data was collected about 49 newly diagnosed cases of SSPE in the years 1993-1995 in Poland. In the analyzed period of time a falling of tendency the incidence of SSPE was maintained. Overall incidence--0.42 per million population, was lower than the incidence in years 1990-1992, when it was 0.72. The tendency of a shift towards older age group was maintained--the peak incidence was observed among 19 year olds, as opposed to 15 year olds in the previous analyzed time period. The authors explain the dropping SSPE incidence in Poland with a drop in measales incidence, which is a consequence of growing measles vaccine coverage rates. The influence of a big measles epidemic which occurred in 1989-1990 on a potential rise in number of SSPE cases has not been noted, but further observations are needed.