[Familial incidence of hepatitis b]. / Rodzinne zachorowania na wirusowe zapalenie watroby typu B.

Among 693 patients treated in our Hospital with HBV, we separated 88 persons from 34 familial focuses. In those separated cases the most likely way of transmission were the familial contacts, without data indicating the other sources of infection (surgery, blood transfusions). The most common source of infection were children. We postulate vaccination of the HBsAg(-) person, staying in the familial contact with HBV patients.