If there is no damage to the oral mucosa of the patient and the child, the chances of the child being infected with the hepatitis B virus by drinking a drink from a patient with hepatitis B are not high. Hepatitis B virus is a contagious virus, which is mainly transmitted vertically, i.e., from mother to child, blood to blood, sexually, and through close contact in daily life. It is not usually transmitted through the digestive system. Children who drink the drinks of hepatitis B patients can rule out the first three ways of transmission, for daily life close contact transmission mainly refers to sharing razors, toothbrushes and other items with patients with hepatitis B may be through the broken skin, gums, the oral cavity broken mucous membranes caused by viral transmission. If the patient, the child oral cavity is not broken, no bleeding gums, etc., the probability of being infected is not great. If parents are too worried, it is recommended that they go to the hospital to have their children tested for the Hepatitis B virus and receive the Hepatitis B vaccine in a timely manner.