Using an immune system isolated from a defined NANB epidemy we could find such markers in 29 of 71 patients (41%). The greater number of the antigen speaks in favour of a large pool of healthy carriers. The small number of patients with antibodies may be explained by the low sensibility of our test which detects only antibodies with high titers. According to this analysis of NANB associated immune markers the clinical importance of this infection in haemophiliacs seems to be small. Statements concerning the chronicity of the disease can not yet be made because of the preliminary character of this random test made in a holiday camp of haemophiliac children.
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