Fever after adenovirus vaccination is mostly due to the antibody reaction stimulated by the vaccine, you can take more rest, physical cooling, and oral antipyretic medication if the fever is high. 1. Rest: If you have fever after adenovirus vaccination, you can rest more and try not to go out in the wind. 2. Physical cooling: Fever after adenovirus vaccine injection is usually low, you can first use physical cooling to reduce fever, such as using warm towels to wipe the body, take a warm bath, drink warm water, do not wear too thick, pay attention to indoor ventilation, heat. 3. medication to reduce fever: fever after adenovirus vaccine injection exceeds 38.5 ℃, the effect of physical cooling is limited, you can follow the doctor’s advice with oral ibuprofen and other antipyretic drugs. If fever persists for several days after adenovirus vaccination, other causes should be investigated, and it is recommended to go to a regular hospital in time and take medication under the guidance of a doctor.