what are the causes of hepatitis b
Hepatitis B Transmission and Causes. The hepatitis B virus is known as a blood-borne virus because it is transmitted from one person to another via blood or fluids contaminated with blood.Another important route of transmission is from an infected mother to a newborn child, which occurs during or shortly after birth.eople who are at an increased risk of being infected with the hepatitis B virus include the following: 1  Men or women who have multiple sex partners, especially if they don't use a condom. 2  Men who have sex with men. 3  Men or women who have sex with a person infected with hepatitis B virus.