In clinical work, many patients ask the question: If I have hepatitis B, will I infect my family and friends? What do I need to pay attention to in general? In fact, how do people get infected with the hepatitis B virus? How does hepatitis B spread in the population? Many people with hepatitis B and their families are confused about this and do not have a proper understanding. In fact, the transmission of hepatitis B can be said to be a variety of ways, the following to introduce you to the main ways of transmission of hepatitis B virus in China. 1, daily life contact transmission broken skin and mucous membranes (including eczema, scabies, oral ulcers or erosion) exposed to blood or infectious body fluids; sharing razors, razors, toothbrushes, etc.; kindergarten sharing toys transmission; shared facilities such as shared swimming pools, banknotes are often highly contaminated, counting banknotes finger hepatitis B detection rate of 73%; cosmetic operations such as tattoos, ear piercing, nail trimming, etc. 2.Hospital transmission Contaminated medical equipment, the environment, health care workers / patient-to-patient transmission, hemodialysis and unclean injection transmission has been rare. Mother-to-child transmission Hepatitis B positive mothers can infect their infants, intrauterine transmission is less likely, mostly perinatal close contact transmission, breastfeeding does not increase the risk of hepatitis B infection in infants, mother-to-child transmission can be effectively prevented by combined immunization with hepatitis B vaccine + hepatitis B immunoglobulin. 4, intravenous drug use Shared use of syringes for drug use has a higher risk of HBV transmission. 5, sexual contact Mostly acute non-dominant infection, that is, transient, unknowingly infected, and then reproduce antibodies, rarely develop into chronic hepatitis B. 6, blood and blood products transfusion after strict management still have a very small number of transmission, about 2 ~ 16 cases of infection per million units of blood. Others such as sharing meals, eating utensils, coughing, sneezing, kissing, breastfeeding, casual contact such as shaking hands, hugging, etc. will not transmit hepatitis B virus.