The following vaccines can cause fever in children: 1) B encephalitis vaccine. After receiving the B encephalitis vaccine, children may have fever and even poor mental status. 2. Measles vaccine. Many children will have a fever after receiving the measles vaccine, and will have a stuffy nose, runny nose, etc. 3, the diphtheria vaccine. Some children will also suffer from fever after receiving the diphtheria vaccine, which is designed to prevent whooping cough, diphtheria and tetanus. As you can see from the above, children can get fever after receiving measles, B encephalitis and diphtheria vaccines, but it is only a matter of probability. Other vaccines can also cause fever in children, such as hand, foot and mouth disease vaccine, A+C flu vaccine, etc., mainly because most vaccines are made from various pathogenic bacteria. This can induce an immune response in the child’s body and can cause fever.