Hepatitis B is a contagious, liver-damaging disease caused by the hepatitis B virus (HBV) that infects the body. Hepatitis B virus mainly exists in liver cells and damages them, causing inflammation, necrosis and fibrosis. Common symptoms include: discomfort in the liver area, vague pain, general tiredness, fatigue, loss of appetite, nausea, aversion to oil, diarrhea, sometimes low fever, and jaundice in severe cases. It is well known that hepatitis B is highly contagious, and in recent years, eight “hepatitis B” college students have been defending their rights to demand a statement, the “heavy beer hepatitis B incident”, the Shaanxi Hanzhong downtown square draft people to eat and other public events caused by hepatitis B. According to the survey, China’s hepatitis B virus infection rate of about 60%-70%; hepatitis B surface antigen carrier rate of about 7.18% of the total population, the country has 93 million hepatitis B virus carriers, of which about 30 million hepatitis B patients, hepatitis B has become a serious health hazard to human social problems, prevention of hepatitis B virus can not wait. So what are the ways of transmission of the hepatitis B virus? There are mainly the following ways: 1, blood transmission: the most important way of transmission of hepatitis B virus. Such as the input of whole blood, plasma, serum or other blood products containing hepatitis B virus, can cause hepatitis B virus infection. To interrupt this transmission route, health care transfusions and blood products should be strictly eliminated, and blood transfusion indications should be strictly controlled to avoid transmission of hepatitis B virus through blood. 2, mother-to-child vertical transmission: China’s existing HBsAg-positive people about 140 million people, 85% of which is through mother-to-child transmission. Vertical transmission is the main reason for the spread and high incidence of hepatitis B in China, there are also a few father-to-child transmitters. Mother-to-child transmission is mainly through infection in the birth canal or intrauterine infection. Mother-to-child transmission includes two aspects, one is vertical transmission and the other is horizontal transmission. The main thing is horizontal transmission during the perinatal and postnatal period in close contact. As a mother of a major triple-positive, the possibility of the child being infected after birth reaches 90-95 percent, and the chances of the child born to an E antigen-negative hepatitis B mother being infected are half as low as those born to an E antigen-positive, about 45-40 percent. 3, sexual contact transmission: is one of the main ways of hepatitis B virus transmission. The chance of transmission is high for unclean sex, such as prostitution, male homosexuality, etc. Normal sex between couples can also transmit hepatitis B virus, but the chance is not high. Pay attention to the hygiene of the couple’s life and eliminate bad sexual behavior can be better prevented. The spouse of a hepatitis B patient should be checked regularly, and if they are all negative, they should be vaccinated against hepatitis B throughout. Hepatitis B can be transmitted through sexual intercourse, and sexual transmission is also a form of body fluid transmission. In addition, kissing can also be transmitted, if the mucous membrane of the mouth and lips is broken also have this possibility. 4, living in close contact: close contact with hepatitis B patients for a long time, sharing toothbrushes, towels, scissors, razors and other infections through trace amounts of blood. Saliva, urine, blood, bile and breast milk can contaminate utensils and articles and spread hepatitis B through broken skin and mucous membranes. Prevention is mainly to correct poor hygiene habits, even if the family, do not share toothbrushes, teacups, razors and other household utensils. 5, medical transmission: such as medical equipment contaminated with hepatitis B virus after incomplete disinfection or improper handling, can cause the transmission of hepatitis B virus, including surgery, dental instruments, blood collection needles, acupuncture needles and endoscopy, etc.. Unclean injections or irregular operations can also cause the transmission of hepatitis B virus. This can be done by making disposable medical instruments, strictly prohibiting intravenous drug use, avoiding irregular needling, tooth extraction and tattooing, tattooing, etc. Those who have skin and mucous membrane injuries should pay attention to wound protection. There are several ways to spread hepatitis B virus, but most of the normal contact in work and life will not lead to infection, so people do not need to panic about having hepatitis B virus carriers around, treat them like ordinary people can get along.