Abstract
A human monoclonal anti-HBsAg antibody (IgGl, λ) was used as a reference for an ELISA determination of the serum levels of anti-HBsAg antibodies in human volunteers after vaccination with H-B vax. The IgG subclass distribution of specific antibodies showed a marked dominance of IgGl antibodies. In addition, small amounts of specific IgG4 antibodies were occasionally found, suggesting a different pattern from that found after natural disease. The novel use of a human monoclonal antibody to measure specific antibodies may give a more accurate determination of specific IgG subclass levels than previously available methods.
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