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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).
The presence of surface antibody (anti-HBs) indicates an individual with immunity to hepatitis B, whether due to previously resolved infection or due to hepatitis B vaccination. [65] For example, an individual who has never had any exposure to HBV, either by vaccine or by infection, would test negative for the entire serology panel.
The hepatitis B vaccine was the first vaccine capable of preventing cancer, specifically liver cancer. [73] Most vaccines are given in three doses over a course of days. A protective response to the vaccine is defined as an anti-HBs antibody concentration of at least 10 mIU/ml in the recipient's serum.
HBeAg is a hepatitis B viral protein, produced by the HBcAg reading frame. 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).
Viral hepatitis is primarily diagnosed through blood tests for levels of viral antigens (such as the hepatitis B surface or core antigen), anti-viral antibodies (such as the anti-hepatitis B surface antibody or anti-hepatitis A antibody), or viral DNA/RNA. [17] [32] In early infection (i.e. within 1 week), IgM antibodies are found in the blood ...
It was discovered to be part of the virus that caused serum hepatitis by virologist Alfred Prince in 1968. Heptavax, a "first-generation" hepatitis B vaccine in the 1980s, was made from HBsAg extracted from the blood plasma of hepatitis patients. More modern vaccines are made from recombinant HBsAg grown in yeast.
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