
Keywords: واکسن مونوژئاز پنوموکوک; Pneumococcal polysaccharide vaccine; 23vPPV; hyporesponsiveness; memory BÂ cell; opsonophagocytosis; antibody; CPS; Cell-wall polysaccharide; FiPP; Fiji Pneumococcal Project; MOPA; Multiplexed opsonophagocytic assay; OI; Opsonization index; OPA; Opsonopha