[Subacute sclerosing panencephalitis (SSPE) in Poland in 1996-1999. Phase VII of epidemiologic studies].

In the seventh phase of epidemiological studies of SSPE data were gathered on patients who developed the disease in 1996-1999. In this time period the diagnosis was confirmed in only 10 cases (4 in 1996, 4 in 1997, 0 in 1998 and 2 in 1999). This is a significant reduction of incidence in relation to the preceding stages, in particular to the years 1993-1995 in which 49 new cases were still reported. This is not ruling out the possibility that at the beginning of the years 2,000 cases would be diagnosed in which the first symptoms developed several or more months earlier.