The pneumonia vaccine is not recommended during the recovery period after pneumonia. Pneumonia is caused by the inflammatory reaction of the lung mucosa due to the invasion of viruses, bacteria and other pathogens by the body’s immune system. After the inflammation is controlled through standard anti-inflammatory treatment, pneumonia is in the recovery period, when the state of congestion, edema and inflammatory secretion of the lung mucosa has not returned to the original normal level, so some symptoms such as coughing and coughing may still occur, and a repair process is needed. Therefore, if the pneumonia vaccine is administered during this period, it is likely to aggravate these pathological states and lead to an enhanced immune response and even fever, so the pneumonia vaccine should be considered at a later date, more than a week after the pneumonia is completely cured.