There is no epidemiologic or statistical data on the exact chance of hepatitis B transmission. Hepatitis B is highly contagious, and the main ways of transmission are mother-to-child transmission, blood transmission, medical device transmission and sexual contact transmission. 1. Mother-to-child transmission: Infants may be infected intrauterine through placenta and amniotic fluid before birth. Some babies are also infected with hepatitis B virus mainly because pregnant women choose to give birth to their babies, during which the babies are infected with hepatitis B virus when they pass through the birth canal of the mother. 2. Blood transmission: blood transmission is also common, hepatitis B virus exists in the blood of hepatitis B virus carriers, and during blood transfusion, hepatitis B virus can be infected through blood to healthy people. 3. Medical equipment transmission: during the process of gastroscopy, colonoscopy and other traumatic examinations, the medical equipment is not completely sterilized and may carry hepatitis B virus, which will easily cause healthy people to be infected with hepatitis B virus. 4. Sexual contact transmission: Hepatitis B virus exists in human body fluids, especially in male semen and female vaginal secretions, which are more frequent, and if no precautionary measures are taken during sex, the other person may be infected with Hepatitis B. If you are infected with Hepatitis B virus, it is recommended that you take precautionary measures. If you are infected with hepatitis B virus, it is recommended that you go to the hospital in time to check your liver function and hepatitis B DNA, and if there is any abnormality, you should be given antiviral treatment in time.