During the past three days the participants of this seminar have discussed in great detail the present status of our knowledge of viral hepatitis. Their presentations were concerned with six aspects of the disease: clinical features, pathology, epidemiology, etiology, immunology, and prevention. In tackling this assignment to briefly summarize the conference I am reminded of a comment by Henry Thoreau who in writing to a friend stated "not that the story need be long, but it would take a long while to make it short." In the limited time which is available I shall attempt to review the highlights of the six sessions devoted to this seminar.
Many viruses have been incriminated as causative agents of hepatitis. In general, viral hepatitis in children and adults is most commonly caused by hepatitis A and B viruses. Hepatitis A is also known as infectious hepatitis or IH, and hepatitis B