Dad has Hepatitis B. Mom has antibodies and usually won’t get infected. Mom’s antibodies protect herself from infection. Without antibodies, the likelihood of infection may increase. Hepatitis B virus is transmitted through blood, sex and mother-to-child transmission, among others. There is also evidence that body fluids such as sweat, saliva, semen, vaginal secretions and breast milk may contain a certain amount of the virus, which may lead to hepatitis B virus infection if it is transmitted through some close life contacts. Hepatitis B antibody has a certain resistance to the hepatitis B virus, which will weaken over time and should be strengthened by regular testing. Quantitative testing for hepatitis B antibodies can be done in the hospital. If the antibody titer is low, it can be strengthened, or every 3 to 5 years. Hepatitis B needs to be prevented by the hepatitis B vaccine. Before injection, you should be examined to see if you can meet the requirements for the injection. Currently, the hepatitis B vaccine is very effective in preventing hepatitis B. The vaccine is not effective in preventing hepatitis B. However, people who have a fever or abnormal liver function should not receive the hepatitis B vaccine. Mom has antibodies, usually will not be infected, but also need regular checkups to strengthen the hepatitis B antibody, dad also need active treatment to control the hepatitis B virus.