The availability of vaccines during pregnancy depends on the type of vaccine administered. Some live attenuated vaccines may not be administered during pregnancy, but some inactivated vaccines are not subject to such restrictions. If a pregnant woman is bitten or scratched by an animal such as a dog or cat during pregnancy and requires rabies vaccination, she should be actively and promptly vaccinated. There are also hepatitis B vaccine and influenza vaccine that can be injected during pregnancy and are not subject to pregnancy restrictions, but some vaccines may have certain effects on pregnant women, so they are not recommended, such as chickenpox vaccine and mumps vaccine. The reason why some vaccines are not recommended during pregnancy is because of the concern that the ingredients of the vaccines may affect the development of the fetus as well as the health of the pregnant woman. Since the fetus is still developing and its functions are not perfect, the ingredients of vaccines may enter the fetus through the placental barrier and cause adverse effects such as growth restriction or malformation. Some vaccine components may also affect the pregnant woman and increase the risk of miscarriage. And during pregnancy, pregnant women are more likely to have adverse reactions to vaccines, which may affect the fetus after treatment with medication and may require termination of pregnancy in severe cases. However, for pregnant women who need vaccination, they should truthfully report their physical condition to the medical staff at the vaccination site before vaccination, and perform vaccination and post-vaccination care according to the guidance and recommendations of the medical staff at the vaccination site. In addition, for the new coronavirus vaccine, it is not recommended for pregnant women to receive the vaccine for the time being. There is no clear clinical evidence of the effect on pregnant women, and pregnant women can receive the vaccine in time after delivery. However, if the vaccine has been administered during pregnancy or pregnancy preparation, there is no need to be overly concerned. The fetus should be monitored and the next step should be taken according to the condition of the fetus and the pregnant woman.