CALCA and malaria: By exclusion of the study by Braun et al. [28], the result shows that patients with severe malaria had a higher mean PCT level than those with uncomplicated malaria (p: 0.004, WMD: 10.4 ng/mL, 95% CI: 3.24–17.51, I2: 82.6%, three studies, Supplementary Figure S3).