TABLE 4.

Mean antibody titers to rNorwalk, rMxV, and rVA387 in sera of Chinese military medical students according to blood type

Blood type	No. of subjects	Average OD versus:
		rNorwalk	rMxV	rVA387
A	130	0.83	0.42	0.77
B	216	0.70a	0.37a	0.77
AB	58	0.83	0.44	0.84
O	184	0.72	0.48	0.80

^aTested by one-way ANOVA test (P < 0.05).