| [antibody formation in type a viral hepatitis]. | immune response to hepatitis type a antigen (haag) was measured by the passive hemagglutination test (pha) and by the immune adherence test (iaha). specific antibodies found by pha are of the igm class which indicates a recent exposure to hepatitis a virus. the antibodies found by iaha reflect the level of postinfectious immune status. the antibody curve is highest in the age group of 30--49 years (95%). the above-mentioned serological tests were carried out with purified by gel filtration in se ... | 1978 | 216149 |