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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.
HBsAg (hepatitis B surface antigen) was the first hepatitis B virus protein to be discovered. [15] It consists of small (S), medium (M) and large (L) protein. [16] HBcAg (hepatitis B core antigen) is the main structural protein of HBV icosahedral nucleocapsid and it has function in replication of the virus. [17]
The appearance is classically associated with abundant hepatitis B antigen in the endoplasmic reticulum, but may also be drug-induced. [1] [2] In the context of hepatitis B, GGHs are only seen in chronic infections, i.e. they are not seen in acute hepatitis B. GGHs were first described by Hadziyannis et al. [2] [3]
Hepadnaviridae [a] is a family of viruses. [2] Humans, apes, and birds serve as natural hosts. There are currently 18 species in this family, divided among 5 genera. [3] Its best-known member is hepatitis B virus.
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Serious side effects from the hepatitis B vaccine are very uncommon. [13] Pain may occur at the site of injection. [13] It is safe for use during pregnancy or while breastfeeding. [13] It has not been linked to Guillain–Barré syndrome. [13] Hepatitis B vaccines are produced with recombinant DNA techniques and contain immunologic adjuvant. [13]
An estimated 296 million people, or 3.8% of the global population, had chronic hepatitis B infections as of 2019. Another 1.5 million developed acute infections that year, and 820,000 deaths occurred as a result of HBV. [1] Cirrhosis and liver cancer are responsible for most HBV-related deaths. [18]
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).