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[HB antigen in the family environment].

HBs antigen was determined in 297 members of 91 families, former blood donors in whom the state of HBs antigen carrier lasted more than six months. The results emphasized the higher proportion of HBs antigen carriers in the family environment than in the general population (7.4% as against 4.9%) and the significantly higher frequency of the antigen among the members of consanguine families.