Hepatitis B is an infectious disease caused by Hepatitis B virus infection, and the main ways of transmission include mother-to-child transmission, blood transmission and sexual transmission, so the risk of transmitting Hepatitis B by having meals with a Hepatitis B patient under normal circumstances is low. Hepatitis B infection is a worldwide epidemic, and the epidemic is non-seasonal, China is a high prevalence area of HBV infection, mother-to-child transmission is the main means of transmission of hepatitis B in China, including vertical transmission at birth and horizontal transmission in close contact in life, about 40% to 50% of the infected are estimated to be infected due to mother-to-child transmission; in addition, sexual transmission, blood transmission is also a more common means of transmission of hepatitis B. Blood, semen, blood and sexual transmission are also common ways of transmission of hepatitis B, so the risk of hepatitis B infection is low. Hepatitis B virus may be present in blood, semen, saliva and breast milk of hepatitis B patients, but the content of hepatitis B virus is the highest in blood and very low in saliva, so there is generally no transmission of hepatitis B virus when eating together with patients suffering from hepatitis B. However, if hepatitis B virus is in a high level of replication in the body of hepatitis B patients eating together, and at the same time there are mouth ulcers, bleeding gums and other conditions, then through saliva Contamination of communal utensils leads to an increased risk of hepatitis B transmission. What happens in this situation is unpredictable, therefore, if the people in close contact around you have hepatitis B, it is recommended that you first check the hepatitis B two-to-half serology test to determine whether there is any antibody to the hepatitis B virus, and if the antibody is negative, you should promptly inject the hepatitis B vaccine. At the same time, when eating together, we should pay attention to the tableware and other personal belongings should be separated and used separately. In conclusion, generally speaking, hepatitis B is not contagious when you eat with hepatitis B patients, but to be on the safe side, it is better to get vaccinated against hepatitis B to prevent hepatitis B infection.