In summary, when assessing and diagnosing patients exhibiting pulmonary complications, which are characterized by an accelerated respiratory rate, atypical lung auscultation findings, elevated levels of CRP, WBC, NT-proBNP, and D-D, along with not responding effectively to standard anti-infection therapies and exhibiting a greater propensity for developing CALs, clinicians should maintain a high index of suspicion for pneumonia-like changes associated with KD. Here, NPPB is linked to susceptibility to pneumonia measurement.