Post-transfusion non-A, non-B hepatitis in the Netherlands.

tions and hospital admissions (r=09; p<0 01). There was a tendency throughout the period, when the figures for whooping cough increased, for the number of notifications to increase proportionately more than the number of admissions. In the peak quarters of 1974 and 1978 there were 25 and 58 admissions and 159 and 666 notifications respectively. We studied Hospital Activity Analysis statistics for a range of other respiratory and infective diseases in childhood during the period but found no disease other than whooping cough for which admissions corresponded with the quarter by quarter trends in whooping-cough notifications. There were three deaths -one in 1974, one in 1977, and one in 1979-ascribed to whooping cough in the region during the period.