[The importance of clinical laboratory data in the differential diagnosis of group hepatitis B diseases].

Group disease with hepatitis B (or A against the background of chronic HBsAg carrier state) may be diagnosed (or excluded) on the basis of high (or low) detectability of HBsAg in patients with jaundice. Perfection of epidemiological diagnosis is possible with implementation of indication of not less than three immunological markers: HBsAg, IgM anti-Hbs, IgM anti-HAV.