Talk to Gynecologist on Hepatitis

Assalam Alaikum, my sister was given a child after 5 five years by Allah, but in the seventh month of pregnancy, the doctors asked to do some tests in which she was positive for hepatitis C. The doctor said that when the time of delivery comes and the baby comes. You should get the child tested, but we did not do that test. After two months, the child was tested and the child also got hepatitis germs. Germs have been transferred from the feeding of the mother, how will the child be treated?