Personal experience with a series of 69 cases of non-A, non-B viral hepatitis out of 164 cases of acute viral hepatitis observed at hospital admission between January 1985 and June 1988 is reported. Agreement is expressed with other Italian series as regards the incidence of sex, of the most involved age classes, of the most affected professional categories and of the incubation period of posttransfusional forms. The prevalence of sporadic forms over those transmitted intraparenterally and more prolonged course in icterus patients and in parenteral forms is pointed out.