The chances of transmitting hepatitis B to your spouse are small. Hepatitis B virus is mainly transmitted through blood and mother-to-child transmission, and spouses can reduce the chance of transmission through vaccination and condom use. However, when spouses have sex, if the genital tract is broken, a small amount of virus can enter into each other’s body, which is easy to be infected. However, the probability of infection is lower than that of blood and mother-to-child transmission. If one of the spouses has antibodies, the probability of being infected is even lower. Even if one does not have antibodies, one can avoid infection by getting vaccinated until the body produces antibodies against hepatitis B, and by using condoms in the meantime. It is recommended that when one spouse has hepatitis B, it is best to keep personal items separate, such as toothbrushes and cups.