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  2. Vaccine-induced seropositivity - Wikipedia

    en.wikipedia.org/wiki/Vaccine-induced_seropositivity

    When a person gets a hepatitis B vaccine then the most common test for hepatitis B will show them to be positive. The usual course of action, in this case, is to give the person a panel of tests for HBsAg, anti-HBc, and anti-HBs (hepatitis B surface antigen, anti-hepatitis B core, and anti-hepatitis B surface). A person who has never been ...

  3. Seroconversion - Wikipedia

    en.wikipedia.org/wiki/Seroconversion

    The typical seroconversion timecourse for hepatitis B. Seroconversion plays a major role in the diagnosis and treatment of hepatitis B infections. [60] As in other viral infections, seropositivity indicates that an individual has a sufficiently high concentration of antibody or antigen in the blood to be detectable by standard techniques.

  4. National Donor Deferral Registry - Wikipedia

    en.wikipedia.org/wiki/National_Donor_Deferral...

    The National Donor Deferral Registry, also known as the (NDDR) is a database of individuals who have tested "reactive" for viral agents like human immunodeficiency viruses (HIV), Hepatitis B virus (HBV), and hepatitis C virus (HCV) and are permanently prohibited from donating plasma. [1]

  5. Hepatitis B - Wikipedia

    en.wikipedia.org/wiki/Hepatitis_B

    Hepatitis B infection has been preventable by vaccination since 1982. [4] [12] As of 2022, the hepatitis B vaccine is between 98% and 100% effective in preventing infection. [1] The vaccine is administered in several doses; after an initial dose, two or three more vaccine doses are required at a later time for full effect. [1]

  6. HBsAg - Wikipedia

    en.wikipedia.org/wiki/HBsAg

    Today, these antigen-proteins can be genetically manufactured (e.g. transgene E. coli) to produce material for a simple antigen test, which detects the presence of HBV. It is present in the sera of patients with viral hepatitis B (with or without clinical symptoms). Patients who developed antibodies against HBsAg (anti-HBsAg seroconversion) are ...

  7. HBcAg - Wikipedia

    en.wikipedia.org/wiki/HBcAg

    HBcAg (core antigen) is a hepatitis B viral protein. [ 1 ] [ 2 ] It is an indicator of active viral replication; this means the person infected with Hepatitis B can likely transmit the virus on to another person (i.e. the person is infectious).

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