IL10 and malaria: Subgroup analysis based on the methods used for the IL-10’s quantification showed a higher SMD of the IL-10 level in patients with severe malaria than in those with non-severe malaria among studies that used an ELISA for the IL-10’s quantification (p < 0.01, pooled SMD: 0.92, 95% CI: 0.31–1.54, I2: 94.35%, 12 studies/14 sub-studies).