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Viral hepatitis type B: propects for active immunization.

S Krugman

    Developments in Biological Standardization
    |January 1, 1975
    PubMed
    Summary
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    Inactivated hepatitis A vaccine: a safety and immunogenicity study in health professionals.

    The Journal of infectious diseases·1995

    Active immunization with heat-inactivated hepatitis B virus (HBV) serum showed protective effects against HBV infection. Immunized individuals demonstrated resistance to infection, unlike unimmunized controls.

    Area of Science:

    • Hepatology
    • Immunology
    • Virology

    Background:

    • Early studies (1970-1971) indicated heat-inactivated MS-2 serum provided protection against hepatitis B.
    • Recent research highlights distinct responses to hepatitis B virus (HBV) exposure in immunized versus unimmunized individuals.

    Purpose of the Study:

    • To compare the clinical and serological responses to parenteral hepatitis B virus exposure in immunized and unimmunized individuals.
    • To evaluate the protective role of antibodies against hepatitis B surface antigen (anti-HBs) versus antibodies against hepatitis B core antigen (anti-HBc).

    Main Methods:

    • Serial testing for hepatitis B surface antigen (HBsAg), DNA polymerase, SGOT, anti-HBs, and anti-HBc post-exposure.
    • Comparison of serological markers and clinical outcomes between actively immunized and serosusceptible, unimmunized individuals.

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    Main Results:

    • Unimmunized individuals showed detectable HBsAg, DNA polymerase, abnormal SGOT, and anti-HBc post-exposure.
    • Successfully immunized individuals did not show these markers but exhibited a booster response of anti-HBs.
    • Anti-HBs correlated with protection and resistance to reinfection, while anti-HBc did not.

    Conclusions:

    • Active immunization with heat-inactivated hepatitis B vaccine confers protection against infection.
    • Anti-HBs is the key marker for protection against hepatitis B virus.
    • Development of an effective hepatitis B vaccine is promising, despite challenges in isolating the virus.