Simultaneous vaccination of hepatitis B and AC influenza vaccine usually does not affect the immunization effect of both vaccines, but may aggravate the adverse reactions, so it is recommended to vaccinate at intervals. In principle, there is no clear indication that hepatitis B vaccine and Acephaly vaccine cannot be immunized at the same time, and the two vaccines usually do not affect each other after entering the body to perform their respective immune effects. After vaccination with hepatitis B vaccine and ac influenza vaccine, the body may experience some adverse reactions, such as mild fever, dizziness, headache, mental disorientation, etc. If the two vaccines are administered at the same time, the adverse reactions may be superimposed, further aggravating the discomfort of the vaccinated. Therefore, if time permits, it is recommended that the hepatitis B vaccine and the ac-fluenza vaccine be administered at least 14 days apart.