IGHG3 and malaria: Among the 121 individuals of the “adults” group, analyses of data by ordinal logistic regression showed that only MSP3 IgG3 and the C:NC ratio of MSP3 were associated with protection, i.e., negatively correlated with the number of malaria attacks (L-R Chi-square = 6.91; p = 0.0086 and L-R Chi-square = 10.84; p = 0.001 respectively).