Daily contact with carriers is not contagious. Transmission requires certain routes, mainly blood transmission, sexual contact and mother-to-child transmission. The hepatitis B virus is a blood-borne virus, and blood must be used as the carrier for different transmission routes. Our blood transfusion management is very strict in recent years, blood transfusion transmission has been very rare; currently more common is the “micro blood inoculation”, such as tattoos, eyebrow tattoo, drug use, etc., because the infection is hidden and do not know. Imagine if a tattoo needle in a beauty store is contaminated, how many women will be infected? Mother-to-child transmission, once the most important route, has been largely blocked due to the widespread vaccination against hepatitis B. Close contact transmission in daily life is mainly due to contact with objects contaminated by the patient’s blood, such as skin abrasions and sores of carriers of “major triple-positive”, releasing a large amount of hepatitis B virus to contaminate the surface of the environment, which can survive outside the body for a long time (about 7 days), and then be infected by the broken skin of susceptible people. Infection from mucosal injury during sexual intercourse. In Europe and the United States, sexual contact is the most important way of adult hepatitis B virus transmission; in our country, hepatitis B cannot yet be considered a sexually transmitted disease.