CALCA and infection: Through comparing the PCT and CRP levels of 169 patients without infection and 200 patients with infection, Zhang Yanping et al. found that,16 the CRP and PCT levels of the infection group were much higher than those of the non-infection group before treatment ((73.16±8.35) mg/L vs (7.89±2.43) mg/L); ((2.47±0.52) μg/L vs (0.19±0.07) μg/L) and (11.31±3.63) mg/L vs (7.23±1.87) mg/L; (1.98±0.45) μg/L vs (0.18±0.06) μg/L) after treatment.