Treatment Prevention Definition Hepatitis B is a virus which affects the liver.
Some people do develop an acute illness and then become immune.
Higher carrier rates than those found in the general population are also associated with injecting drug use, prostitution and unprotected male to male anal intercourse. See Statistics page for more information. Transmission Transmission of infection involves the exchange of body fluids including semen, vaginal fluid and blood. This includes inoculation or mucosal contact. Viral particles also occur in other body fluids such as saliva, tears and breast milk .