Hepatitis B is an infectious disease caused by hepatitis B virus infection, which is mainly transmitted through sexual intercourse, blood transmission and vertical transmission from mother to child, while the risk of transmitting hepatitis B through sharing dishes is low. The risk of transmission of hepatitis B through sharing dishes is low. The transmission routes of hepatitis B include blood and body fluid transmission, mother-to-child transmission, sexual contact transmission, and contact with broken skin and mucous membranes, etc. The strength of infectiousness is proportional to the amount of virus in the patient’s body. China is a country with a high prevalence of hepatitis B. Mother-to-child transmission is the main transmission route of hepatitis B in China, and it is estimated that 40% to 50% of infected patients are infected by mother-to-child transmission; in addition, sexual transmission and blood transmission are also the more common transmission routes of hepatitis B. Although hepatitis B virus may exist in the blood, semen, saliva and breast milk of hepatitis B patients, the content of hepatitis B virus is highest in blood and very low in saliva, so the act of sharing a meal will generally not lead to the transmission of hepatitis B. However, if the hepatitis B virus is replicated at a high level in the body of the patient with the same meal, and there are oral ulcers and bleeding gums, the risk of hepatitis B transmission through saliva contamination of common dishes will The risk of hepatitis B transmission through saliva contamination of communal dishes will increase. Therefore, if you have close contact with someone who has hepatitis B, such as a family member or colleague, try to separate dishes and other personal items for single use, and it is recommended to have your hepatitis B two-to-one test. If you are positive for hepatitis B surface antibody, it indicates that you are immune to the hepatitis B virus and will not be infected by hepatitis B. If you are negative for hepatitis B surface antibody, it is recommended that you get a hepatitis B vaccination. Therefore, hepatitis B is mainly transmitted vertically through sexual contact, blood, body fluids and from mother to child. In general, sharing dishes will not transmit hepatitis B. However, for insurance purposes, people who have not had hepatitis B are advised to get the hepatitis B vaccination to prevent hepatitis B infection.