Serum CRP values from these patients revealed to be valuable in the following ways: (1) CRP values were especially high in patients with pneumonias caused by S. pneumoniae or L. pneumophila; (2) CRP values increased with the severity of disease, showing that CRP can be used to predict the severity of disease; (3) CRP allowed the commencement of appropriate treatment [9]. Here, CRP is linked to susceptibility to pneumonia measurement.