Following the report that the isotype distribution of antimalarial antibodies was a critical parameter of malaria immunity [46], various studies confirmed the increase of IgG3 with age, and hence with protection, for many malarial antigens including SIRBC extract, MSP1, MSP2, AMA1, RESA, GLURP, p126-SERP-SERA, EBA 175, TRAP, and Exp1 [28,38,39,45,52,55–62]. Here, PHGDH is linked to malaria.