Hepatitis B Virus is from Hepadnaviridae family and has bistrand DNA. This virus is the main factor of infection to Hepatitis and is recognized through blood transfusion with Hepatitis C. Infection to HBV virus may demonstrate a range of clinical protest including mild and unclear symptoms, to deadly ones, such as liver Cirrhosis and liver cancer.
Classification of Hepatitis B requires identification of various serologic indexes which are observable in three phases of incubation, acute and recovery from infection. Getting free from HBsAg after treatment, shows recovery, while its presence for more than one year is the symbol of disease progression to a chronic stage of the disease. During acute term of the disease (infection), strong serologic responses are developed that increasing titer of Anti-HBs is a sign of healing.