Hepatitis Viruses

Hepatitis B Viruses (HBV)
HBV is a leading cause inflammation of the liver, chronic hepatitis, cirrhosis, and hepatocellular carcinoma, accounting for one million deaths annually.
HBV is infects humans. Because of highly infectious virus in the blood of both symptomatic and asymptomatic patients, chronically infected individuals poses a serious threat to all healthcare workers, and immunization of individuals is generally required. A highly effective vaccine is available and included among routine childhood immunizations
Hepatitis A virus
Hepatitis A virus (HAV). Although at one time HAV was also known as Enterovirus 72, HAV, of which there is only one serotype, causes viral hepatitis. As with the enteroviruses, transmission is by the fecal-oral route, and the virus is shed in the feces. For example, a common mode of transmission of the virus is through eating uncooked shellfish harvested from sewage-contaminated water. The main site of replication is the hepatocyte. liver function is significantly impaired, and the development of persistent infection and chronic hepatitis is uncommon. Prevention depends on taking measures to avoid fecal contamination of food and water. Vaccines prepared from whole virus inactivated.