If a child develops a fever after a rabies vaccination, the fever is mainly due to a reaction to the vaccine and can be treated with the following measures. First, the child should get plenty of rest, which will help improve the child’s immunity and thus help the fever to subside. Secondly, children should be given antipyretic medications, such as acetaminophen or ibuprofen if the fever is above 38.5°C in the axilla. In addition, children should drink more warm water because the consumption of body water after fever is relatively large, so drinking more warm water can help replenish water and help the fever improve as soon as possible.