Table 3.

Probabilities of Remaining Asymptomatic or Uninfected for Test Group Cohort Subjects.

Probability all cohort subjects remain healthy
Post-exposure symptom-presentation rate (p) →			0.04	0.14 (from Table 2)	0.24
Cohort	s	n	(1-p)ns
a	3	9	0.332	0.0170	0.000605
b	4	6	0.375	0.0268	0.00138
c	2	5	0.665	0.221	0.0643
d	1	3	0.885	0.636	0.439
Totals	10	23	0.0733	0.0000643	0.0000000240