Hepatitis B is a very contagious liver disease, which is not only difficult to treat, but also very difficult to recover from, in addition, if hepatitis B patients do not do a good job of personal protection may also infect their friends and family members, so we must do a good job of prevention for hepatitis B, so as not to affect their lives. So what aspects of hepatitis B prevention need to start with? The transmission of hepatitis B, in addition to transmission through the digestive tract, may also be transmitted through the blood by injection. For example, blood transfusions, injections with unclean needles and syringes, acupuncture needles, surgical and dental instruments that are not thoroughly sterilized, etc., can spread hepatitis B. Another example is mosquitoes, bedbugs and other blood-sucking animals may also transmit hepatitis B. Pregnant women who are infected with hepatitis B may directly transmit the hepatitis B virus to their babies before, during and after delivery. Infection with hepatitis B during infancy can easily lead to chronic hepatitis B, liver cirrhosis and eventually liver cancer. Preventive measures are: 1, injection supplies and medical equipment should be strictly disinfected, only 75% alcohol soaking, wiping is not able to kill the hepatitis B virus, so as to achieve the purpose of prevention. 2.Keep the quality of blood transfusion and blood products. Use the most sensitive inspection methods to screen the blood source of blood transfusion and blood products whether they contain hepatitis B virus, to prevent the import into the human body; to check the health status of professional blood donors at all times, found to have hepatitis B infection signs or hepatitis B virus surface antigen carriers can not donate blood, which is also a common method to prevent hepatitis B. 3. Cut off saliva transmission. The hepatitis B virus can be caught in the saliva of 50 to 80% of hepatitis B virus carriers. Feeding food mouth-to-mouth to children is a bad habit and should be stopped, which is one of the most commonly used methods in preventing hepatitis B disease. 4. Blocking mother-to-child transmission. If mother-to-child transmission can be completely prevented, the number of hepatitis B surface anti-carriers in China can be reduced by 1/3. there are currently more than 100 million surface antigen carriers in the country. The best way to prevent mother-to-child transmission is to give the newborn a dose of hepatitis B immune globulin immediately after birth, followed by a dose of hepatitis B vaccine at 1 month, 2 months and 3 months of age. If hepatitis B immunoglobulin is not available, hepatitis B vaccine alone is also very effective, and the method is to give one dose of hepatitis B vaccine at birth and one dose at 1 month and 2 months after birth. 5.The main points to prevent the transmission of hepatitis B through the fecal-oral route are basically the same as those for hepatitis A. 6, mosquitoes, bedbugs, fleas and other blood-sucking arthropods may also spread hepatitis B. Therefore, prevention of hepatitis B should be good family and environmental hygiene, diligent bathing, diligent change of clothes, diligent washing and bedding. 7, timely isolation and treatment of patients. The isolation period of hepatitis B patients is longer than that of hepatitis A patients. Prevention of hepatitis B must be done from the life little by little, especially to cut off the transmission of hepatitis B, so that you can not only avoid hepatitis B disease, but also to avoid the impact of family life.