Preventing hepatitis B infection, personally, consists of two parts: first, you need to understand how hepatitis B is transmitted; second, you need to know when and who should be vaccinated Current research shows that hepatitis B is a blood-borne disease, transmitted mainly through blood, mother-to-child and sexual contact. This means that you can only be infected if your blood comes into contact with the blood of a hepatitis B patient. This reminds us to pay attention to one is to maintain the integrity of the skin mucosa, as long as the skin mucosa is intact, there will be no wounds, and will not see blood, the possibility of infection is greatly reduced; two is to try to avoid going to that unregulated small clinics or small black store pedicure, scaling, tooth extraction, tattoos, ear piercing, all of which may come into contact with the blood of hepatitis B patients; three is to pay attention to life do not share toothbrushes and razors. Fourth, unsafe injections, especially drug injections, are particularly risky. There is also the high risk of infection from unprotected sexual contact with people who are positive for hepatitis B virus, especially those with multiple sexual partners (therefore it is recommended to always use condoms to prevent hepatitis B and AIDS, etc. in case of unknown health of sexual partners). Mother-to-child transmission is a common mode of transmission of hepatitis B in China and occurs mainly during the perinatal period, mostly during the delivery of the baby from contact with the blood and body fluids of the HBV-positive mother. It is also worth mentioning that many people discriminate against or misunderstand hepatitis B patients, and even try to avoid daily contact. In fact, this is unnecessary. It has been found that hepatitis B is not transmitted through the respiratory and digestive tracts, so daily life, work and living contacts, such as working in the same office, sharing computers, shaking hands, hugging, living in the same dormitory, eating in the same restaurant, sharing toilets and other non-blood-exposed contacts, are generally not infected with HBV, nor has it been found that hepatitis B can be transmitted through mosquitoes or fleas. How to prevent hepatitis B infection: Hepatitis B vaccination is the most effective way, mainly for newborns, infants and children, people under 15 years old who have not been vaccinated and high-risk groups. One of the most common high-risk groups is the family members of hepatitis B patients, because family members are in close contact and have a greater chance of blood-to-blood transmission. Therefore, it is recommended that all family members of hepatitis B patients should be checked for hepatitis B. Those who do not have hepatitis B and do not have antibodies should be vaccinated. (Generally, the local community has a place to vaccinate children, but large hospitals generally do not help with the vaccine, the whole process requires 3 shots, after the first shot, after a month to play a shot, half a year to play the third shot), after playing, you have to go to the hospital to check whether there are antibodies. If there are antibodies, there is protection, and generally antibodies can be maintained for 12 years. Newborns should be vaccinated within 24 hours after birth, the sooner the better, and they should also receive a shot of hepatitis B immunoglobulin (blocking rate 87.8% or even higher) Other high-risk groups include workers in childcare facilities, people who often receive blood transfusions or blood products, people with low immunity, homosexuals or people with multiple sexual partners and intravenous drug users, all of whom are recommended for hepatitis B vaccine prevention.