Fever after rabies vaccination usually lasts for about three days in children, and the exact time varies depending on the condition of the child. After rabies vaccination, there is a certain chance that fever and chills will occur, and this adverse reaction is mostly seen in children; however, if the body does not have obvious systemic symptoms and the fever is relatively low, it may be the body’s normal immune response. The fever usually subsides in about three days, but if the symptoms continue to worsen, it is recommended to seek medical attention for symptomatic treatment. Children should rest after rabies vaccination, avoid excessive fatigue, and avoid spicy and stimulating foods to minimize the adverse effects of the vaccination; if fever occurs, drink plenty of water or use physical cooling to alleviate the symptoms. If other symptoms occur after vaccination, you need to consult a doctor as soon as possible to get a clear diagnosis.