TABLE 2.

Neutralizing tests at 200 TCID₅₀ per well^a

No. of injections before bleeding	Neutralizing titerb (avg of 2 expt)
0 (preimmune serum)	0
8	70
12	364
14	208
16	256

^aNeutralizing tests were done using a 96-well plate at 200 TCID₅₀ per well.

^bDetermined by the Reed-Muench method.