As we have learned from the previous article, hepatitis B is a blood-borne disease and is mainly transmitted through blood (transfusions and blood products, broken skin and mucous membranes), mother-to-child and sexual contact; it is not transmitted through daily school, work or life contact. Therefore, for a person infected with hepatitis B virus, daily contact with others is not a concern. The only people who are really at risk of being infected are the closest types of people. However, this can be avoided by paying attention to the following things. 1, to prevent their own blood from contaminating others. As a person infected with the hepatitis B virus, when performing various surgeries, infusions and other medical practices, it is best to explain your situation to your doctor so that medical staff can protect you during the operation. In addition, sharing toothbrushes and razors also carries the risk of infecting others, so they should also be avoided. A more special category of people is the injecting drug population. Sharing syringes is a common way of transmitting hepatitis B, so it is recommended that such people be vaccinated against hepatitis B. 2. Sexual partners of people infected with hepatitis B virus should be vaccinated against hepatitis B. The so-called sexual transmission includes not only various ways of sexual behavior, even close contact between lovers kissing such as may also transmit hepatitis B. Therefore, for the prevention of hepatitis B, sexual partners of hepatitis B infected people should be vaccinated against hepatitis B, which is more reliable than using protective measures such as condoms. 3. Women with hepatitis B virus infection should consult liver disease when preparing for pregnancy. Hepatitis B mother-to-child transmission interruption involves the whole process of childbirth from pregnancy to breastfeeding, and the measures to be taken at different times vary according to the HBV DNA level and liver function of the pregnant woman. Therefore, during pregnancy preparation, mothers-to-be should consult an experienced hepatologist to find out what kind of MTCT measures they should take to avoid infecting their babies.