During the 10-month-long pregnancy, pregnant women will inevitably encounter one or another problem, and sometimes need to be vaccinated against diseases, however, some vaccines are harmful to the fetus, and some may even cause fetal malformations, but some vaccines can be used by pregnant women, not only to prevent infection, but also will not affect the fetus, can you get hepatitis B vaccine during pregnancy? Vaccines are divided into many kinds, the most common ones such as live attenuated vaccine, which is a live attenuated virus or bacteria that has undergone various treatments to reduce the toxicity of the virus or bacteria, and after inoculation into the human body, the live attenuated virus or bacteria will stimulate the body to produce a high response until it plays a protective role. However, since the virus or bacteria in the vaccine are still active and can still enter the fetus through the placenta and have an effect, there is no absolute safety for the fetus. This vaccine does not affect the mother or the fetus and can be administered during pregnancy. Hepatitis B vaccine is one of these vaccines. At this stage, it is stipulated that people with negative antibodies should be vaccinated every 3-5 years with 3 doses each time. Since this vaccine is an inactivated vaccine, pregnancy is possible with hepatitis B vaccine. However, since all vaccinations are subject to certain reactions after vaccination, such as low immunity and discomfort, pregnant women may be infected with other viral or bacterial infections after vaccination, which is detrimental to both the mother and the fetus, all pregnant women can receive the hepatitis B vaccination if necessary, and for insurance purposes can wait until after delivery before receiving the hepatitis B vaccination.