Hepatitis B minor triplet is contagious and can be transmitted to the baby if the baby has not acquired immunity to the hepatitis B virus at this time. When the baby is in the mother’s womb and the mother has hepatitis B and is a minor third-positive, it is possible to transmit it to the baby. However, the intrauterine route is not very likely to be transmitted to the baby because of the placental barrier and the amount of virus is not too high. At the time of delivery, it is possible for the baby to be infected because it comes into contact with the mother’s blood. This situation can be blocked by giving the newborn the hepatitis B vaccine and hepatitis B immunoglobulin, which can block most cases of mother-to-child transmission. And when the baby is born, there is also the possibility of transmission through close contact between the mother or father. In this case, the baby can be given the hepatitis B vaccine at birth and in the first month of life, and in the sixth month after birth. If the baby develops surface antibodies to hepatitis B, he or she will be immune to it and will not be infected.