TABLE 1.

IC₅₀s of capsular polysaccharides in the binding of vaccine-induced GBS IIIPS-specific antibodies to IIIPS in the fluid phase (RABA) and in the solid phase (III-HSA and IIIPS + mHSA ELISAs)^a

Immunoassay	IC50 (ng/ml) with indicated serum and inhibition
	SHRS III			Reference serum 19
	GBS IIIPS	GBS III-HSA	Pn14 PS	GBS IIIPS	GBS III-HSA	Pn14 PS
GBS III RABA	175	215	10,000b	NDc	ND	ND
III-HSA ELISA	38	38	10,000	215	375	NId
IIIPS + mHSA ELISA	3	3	1,000e	1	1	NI

^aData are from Fig. 1 and 6 or not shown.

^bThe IC₄₀ is given.

^cND, not done.

^dNI, no detectable inhibition.

^eThe IC₄₅ is given.