Table 3.

Calculation of estimated probabilities of protective immunity against PUUV infection based on the protection data from Table 2

Estimated probability of protective immunitya	Prechallenge PUUV PRNT50 titer	Lower 95% fiducial limit	Upper 95% fiducial limit
0.40	24	8	77
0.50	37	13	148
0.60	59	22	305
0.70	97	35	713
0.80	177	58	2,122
0.90	438	119	11,700

^aDetermined by logistic regression by Probit. Protection status by titer was used to calculate estimated probabilities of protective immunity.