If your baby has a fever after the pneumonia vaccine, you should first measure the child’s body temperature and continue to observe the physical cooling of the body temperature below 38.5°C. If the body temperature continues to rise above 38.5°C for 2 hours, you should treat the child with antipyretic drugs, such as oral ibuprofen suspension or acetaminophen suspension. After the pneumonia vaccine, the pneumonia vaccine contains some inactivated pathogenic microorganisms that can easily lead to pneumonia. At this time, if the symptoms of nasal congestion and runny nose appear, it is possible that these pathogenic microorganisms lead to upper respiratory tract infections. If there is a serious fever, in addition to coughing and coughing symptoms, there may be a case of pneumonia, and the child needs to be hospitalized under the guidance of a doctor for treatment.