Pregnant women are generally not allowed to get the hepatitis B vaccine. In addition, there are these contraindications to hepatitis B vaccination as follows. 1. febrile symptoms: if the body temperature of the vaccinated person exceeds 37.5℃ before vaccination, it is not recommended to vaccinate against hepatitis B to avoid causing discomfort. 2. Acute diseases: such as angina pectoris, myocardial infarction and acute appendicitis, etc. Vaccinees suffering from these diseases should not be vaccinated with hepatitis B vaccine to avoid affecting their health. 3. history of allergy: if the vaccine recipient has a history of allergy to the vaccine, such as acute facial swelling, rashes and fever, etc., the vaccine recipient is generally not allowed to receive the hepatitis B vaccine. In addition, there are many other things that need to be paid attention to when receiving hepatitis B vaccine, and if it is necessary to receive the vaccine, it is recommended to consult with a specialist before receiving the vaccine, so as to avoid affecting the health of the body.