Contraindications to vaccination include allergy to vaccine components, acute or chronic disease attacks, severe mental illness, pregnant women, and so on. The inactivated vaccine is characterized by a milder adverse reaction when it enters the human body, and therefore has a wider scope of application. Contraindications to inactivated vaccination include allergy to any of the active ingredients in the vaccine, acute diseases such as fever, chronic diseases in the acute exacerbation phase such as hypertension which is not under control at this time, severe clinical symptoms such as vertigo, severe neurological diseases such as uncontrolled epilepsy, etc. Pregnant women are also not allowed to be vaccinated. Usually, those who exclude contraindications to vaccination can be vaccinated according to the prescribed immunization procedures, and the vaccination usually produces a better immune effect, so please consult the physician at the vaccination site before vaccination.