The following are common ways of infection with the hepatitis B virus: 1. Mother-to-child transmission. If the mother is a carrier of hepatitis B virus and has a high virus content, she may transmit the virus to her baby through the placenta and may be infected with the hepatitis B virus. 2. Transmission through sexual intercourse, because the hepatitis B virus exists in human body fluids and secretions, so the hepatitis B virus is contained in the secretions of the reproductive tract and there is a possibility of infection with the hepatitis B virus through sexual intercourse. 3. 4. sharing syringes or using medical equipment that has not been thoroughly sterilized with a person with hepatitis B. 5. transfusing blood products containing hepatitis B virus.