The HBS Antigen Subtypes workshop convened to present and discuss the latest findings on the classification and characterization of Hepatitis B virus surface antigen subtypes. The proceedings detail the research presented by international experts, focusing on the serological and biochemical methods used to differentiate these subtypes. The discussions aimed to establish a standardized nomenclature and understanding of their epidemiological significance, addressing the challenges posed by the variability of the HBsAg. This volume captures the state of knowledge in 1975 regarding the complex antigenic structure of the Hepatitis B virus.

This volume represents a critical snapshot of research into HBsAg subtypes at a pivotal moment in virology. The collection of papers from the 1975 Paris workshop provides essential historical data for understanding the evolution of Hepatitis B research and diagnostics. Its value lies in documenting the foundational work that informed later discoveries about the virus and its public health impact.