Hepatitis B can be transmitted through sexual contact, and it is possible to transmit hepatitis B between husband and wife. However, if the other party has been vaccinated and has a strong body resistance, it may not be easy to feel, so it is difficult to transmit between the couple. 1, vaccination: many patients will be injected with hepatitis B vaccine after birth, the injection of hepatitis B vaccine will produce hepatitis B surface antibody, immunity to the hepatitis B virus, can avoid infection with the hepatitis B virus. Therefore, even if one spouse suffers from hepatitis B after marriage, the probability of the other spouse being infected is smaller; 2. Strong immunity: adults have a more mature immune system, when couples have sex with each other and cause the spread of hepatitis B virus, the human immune system will start the function of immune surveillance and immune clearance to identify the invading hepatitis B virus and clear it. Moreover, the transmission of a small amount of hepatitis B virus will not cause disease in humans, but will continue to stimulate the activity of hepatitis B surface antibodies, which will increase the activity of hepatitis B surface antibodies. Most adults who are infected with the hepatitis B virus can heal on their own, and only a small percentage of the population will develop chronic hepatitis B. Even though it is difficult to transmit hepatitis B between couples, it is important to do regular reviews to check if both couples have hepatitis B surface antibodies, and if they do not have antibodies, they should get vaccinated in time to avoid the spread of hepatitis B between couples.