When someone in the family has hepatitis B, it is possible for others to be infected. This is because hepatitis B is excreted through various bodily fluids, such as the patient’s blood, vaginal secretions, semen, saliva, breast milk, menstruation, urine, sweat, etc. That is, most of the secretions, in fact, have the hepatitis B virus in them. Hepatitis B can be transmitted through three main ways: 1, common is mother-to-child transmission, usually the mother is easily transmitted to the fetus during childbirth, or postpartum breastfeeding. 2, transfusion of blood and blood products, or sharing of needles, etc., is easy to spread. 3, close contact transmission, such as the sexual life of the couple, through broken skin mucous membrane. Therefore, the family must be well protected, and the best protection is the hepatitis B vaccination.