The hepatitis B virus can be transmitted in the following ways: 1. sex, the hepatitis B virus exists in body fluids such as saliva, tears, reproductive tract fluids, etc. Therefore, the hepatitis B virus is also contained in semen and cervical fluid, so it can be transmitted through sex. 2. blood transfusion, if the blood containing the hepatitis B virus is transfused, you can be directly infected with the hepatitis B virus. In addition, if you share razors, eyebrow tattoos, etc., the virus can get on these tools when the mucous membrane is broken and bleeding, and there is a chance of infection to others. In addition, some drug addicts share syringes with others who have hepatitis B, and the virus can infect the needle through the vein. 3, mother-to-child transmission, the hepatitis B virus can be transmitted to the baby through the placental barrier.