Table 2. Parameters that are most predictive of protection.

Cell type	Phenotype	Parameter	Weight
B cell	Memory B cell ELISpot	PF.CSP.T2	79
		PF.16.T4	64
		PF.CSP.T5	53
T cell	CD40L+CD4	CD40L.CSP.T4	100
		CD40L.CSP.T6	57
		CD40L.CSP.T2	52
	Ag.pTfh	Ag.pTfh.CSP.T2	71
		Ag.pTfh.IL.21.HBs.T4	60
		Ag.pTfh.IL.21.CSP.T6	56
		Ag.pTfh.IL.21.HBs.T6	55
		Ag.pTfh.IL.21.CSP.T4	49
	Total. pTfh	Total.pTfh.MED.T2	49
		Total.pTfh.MED.T4	43
		Total.pTfh.MED.T6	40
	Ag.CD4	CSP.T4	46
		CSP.T6	38
		MED.T6	42
		HBs.T4	52

Abbreviations: Ag.pTfh, antigen specific peripheral T follicular helper cells; Ag.CD4, antigen stimulated total CD4 T cells; ELIspot, memory B cell ELISpot responses; CD40L⁺CD4, CD40L+ CD4 T cells.