TABLE 1.

Summary of analysis for pre- and postvaccination sera^a

Sero- group	IgG concn (μg/ml) [range (GMC)]		Bactericidal titer [range (GMT)]
	Prevaccination	Postvaccination	Prevaccination	Postvaccination
A	0.05-4.49 (0.2)	0.9-356.4 (14.3)	2-2,048 (221)	128-32,768 (3,898)
C	0.05-1.33 (0.1)	2.8-54.4 (14.8)	2-1,024 (7)	64-8,192 (1,485)
W135	0.05-6.37 (0.15)	0.05-331.21 (5.9)	2-2,048 (27)	128-32,768 (1,855)
Y	0.05-4.32 (0.14)	0.08-60.67 (3.76)	2-1,024 (11)	64-32,768 (2,152)

^an = 28 samples.