Thus, Roed et al. [26] in a cohort of 100 pneumonia (25 positive Legionella UAT compared to 75 negative Legionella UAT) showed that a CRP level > 200 mg/L had a sensitivity at 92% in the group positive Legionella UAT versus only 27% in the group negative Legionella UAT). Here, CRP is linked to susceptibility to pneumonia measurement.