It is recommended to complete all three doses of hepatitis B vaccine, which will improve the ability to produce antibodies clinically. 30% of people will produce antibodies to hepatitis B surface antigen after the first dose, 90% of people will produce antibodies after the second dose, and the positive rate can reach more than 96% after the third dose. It is recommended that the hepatitis B vaccination be completed during pregnancy. After vaccination, local redness, swelling, pain and temperature increase may occur. It is recommended to closely observe the changes in the body after receiving the full hepatitis B vaccine.