Hepatitis B mothers-in-law with children are generally not harmful. Hepatitis B is mainly transmitted through blood, sexual contact and vertical transmission from mother to child. Moreover, all children will be vaccinated against hepatitis B after birth, so most of the children have antibodies against hepatitis B. Therefore, living, working, eating and studying together will not transmit hepatitis B virus. Therefore, living, working, eating and studying together will not transmit the Hepatitis B virus. In this case, there is usually no harm for the mother-in-law to bring up the child, so parents do not need to worry too much. If parents are still worried, it is recommended that they can take their children to the hospital for a blood test to quantify Hepatitis B; at the same time, it is also recommended that mothers-in-law with Hepatitis B undergo a physical examination every six months to check for hepatitis flare-ups.