China belongs to the high endemic area of hepatitis B. After the hepatitis B vaccine was included in the childhood immunization program, the hepatitis B surface antigen carriage rate in China has decreased significantly compared with the previous one. The latest epidemiological survey shows that the national hepatitis B surface antigen carriage rate for people aged 1-59 years is 7.18%. Among them, the lowest rate of hepatitis B surface antigen carriage is 0.96% for people aged 1 to 4, 2.42% for people aged 5 to 14, and the highest rate of hepatitis B surface antigen carriage is 8.57% for people aged 15 to 59. Many people are afraid of hepatitis B. When they hear that their colleagues or classmates have hepatitis B, they avoid it, but this is not true, mainly because they do not understand the ways of transmission of hepatitis B. So what are the main ways of transmission of hepatitis B? 1, mother-to-child transmission Mother-to-child transmission is a way for pregnant women carrying the hepatitis B virus to infect their babies, and it is also the most common and most important way of transmission. It includes intrauterine infection that occurs during pregnancy, perinatal transmission that occurs before and after delivery (during the period from pregnancy 28 weeks to after birth), and transmission that occurs during breastfeeding, of which perinatal transmission is the main mode of mother-to-child transmission, mainly through contact with the blood and body fluids of hepatitis B virus-positive mothers during delivery. 2.Blood transmission With the promotion of blood donation and strict screening of blood donors, transmission caused by blood transfusion is no longer important. 3.Broken skin and mucous membranes Body fluids or blood containing hepatitis B virus can be transmitted through broken skin and mucous membranes, such as pedicures, tattoos, earrings, communal razors and toothbrushes, etc. 4, sexual contact transmission Because the semen and vaginal secretions of hepatitis B virus-positive people contain hepatitis B virus, so there is the possibility of transmitting hepatitis B virus during sexual life. In addition, there are some ways in the transmission of hepatitis B is not very significant. For example, mosquito bites, some people will think, since hepatitis B can be transmitted through the blood, then mosquitoes bite hepatitis B patients, and then bite me, will not bring the virus to me? In fact, scientists have explored whether hepatitis B is transmitted through the mosquito vector, and so far, transmission by mosquitoes, bedbugs and other blood-sucking insects has not been confirmed. General living or working contact will not transmit the hepatitis B virus. The “Guidelines for the Prevention and Treatment of Chronic Hepatitis B” developed by the Infectious Diseases Branch of the Chinese Medical Association states that: daily work or living contacts, such as working in the same office (including sharing office supplies such as computers), shaking hands, hugging, living in the same dormitory, eating in the same restaurant and sharing toilets without blood exposure, generally do not transmit HBV; transmission by blood-sucking insects (mosquitoes, bedbugs, etc.) has not been confirmed. The Hepatitis B Prevention and Control Guidelines developed by the American College of Hepatology also mention that: people with hepatitis B infection can participate in all activities, including contact sports; children with hepatitis B infection should not be refused admission to school and do not have to be isolated from other children; people with hepatitis B infection can share food, utensils and kiss with others.