Table I.

Antibody titers in the sera of the immunized mice.

Group	1:103	1:104	1:105	1:106	1:107	1:108	Negative control	Blank control
1	2.642	1.722	0.699	0.386	0.201	0.063	0.052	0.040
2	2.944	2.327	0.973	0.332	0.148	0.090	0.041	0.039