• Serology- and antigen-based diagnostics formed the backbone of hepatitis typing and surveillance, integrating incubation-phase antigens, HBV surface/core markers, and Australia Antigen variants across sera, leukocytes, and clinical settings [1], [4], [10], [13], [14], [15], [17].

• Clinical taxonomy and natural history mapped distinct infectious hepatitis types, prognostic trajectories, and progression to chronic liver disease, guiding diagnosis, prognosis, and management [2], [5], [6], [11], [19].

• Immunology and immunotherapy research diversified from LE-cell phenomena to gamma globulin prophylaxis and HBV-core antibodies, shaping our understanding of immune responses and therapeutic strategies for hepatitis [7], [8], [16], [17].

• Public health and transmission studies stressed infectivity periods, waterborne outbreaks, and generalized infectious hepatitis patterns to inform outbreak response and infection-control policies [9], [12], [18].

• Pathology and laboratory-method advances linked tissue necrosis patterns with diagnostic assays, including pattern of necrosis in acute viral hepatitis and hemagglutination-based antigen/antibody tests that underpinned diagnostic pathology [10], [20].