It is generally believed that the spread of hepatitis B virus is not closely related to water and food. Although swallowing infectious blood can lead to experimental infection with hepatitis B, there are no reports of outbreaks of hepatitis B through water and food. Therefore, eating with hepatitis B patients is generally not contagious. However, this is not absolute. Because the saliva of hepatitis B and hepatitis B virus carriers may contain hepatitis B virus, it is suggested to share food with hepatitis B patients. It is best to bring your own chopsticks, lunch boxes, teacups and other tableware, wash your hands before and after meals or wipe your hands with sterile towels, and use public chopsticks to prevent cross-infection. At the same time, inject hepatitis B vaccine.