Hepatitis B blocking shots include Hepatitis B immune globulin and Hepatitis B vaccine and are generally effective when given at 20 hours. If there is a potential for hepatitis B infection, the hepatitis B blocker shot is effective when given within 24 hours of birth and can go a long way toward preventing hepatitis B virus infection in infants. Hepatitis B can be transmitted from mother to child, and pregnant women with hepatitis B who want to prevent their children from developing hepatitis B can get their children a hepatitis B blocker shot during pregnancy or within 24 hours of delivery. The Hepatitis B vaccine, which is included in the Hepatitis B blockade shot, has a limited vaccination schedule and needs to be received three times after the baby is born, at one month of age and at six months of age. If a woman has a high hepatitis B DNA load during pregnancy, she can take oral antiviral medications to block the spread of the hepatitis B virus. The probability of mother-to-child transmission of the hepatitis B virus can be minimized by vaccinating the baby with the hepatitis B blocking shot after the baby is born. If a pregnant woman is infected with Hepatitis B virus, it is recommended that she visit a hospital in time to have her Hepatitis B viral load tested, and under the guidance of a doctor, treatment is carried out to prevent the transmission of Hepatitis B to the next generation.