TABLE 2.

Viral load prior to challenge

Determination	No. of virions (area under the curve) on indicated challenge group (n = 4)
	5 week	10 week	15 week	25 week
1	3.0 × 106	2.0 × 107	1.3 × 107	9.5 × 106
2	8.3 × 106	1.8 × 106	1.8 × 107	1.5 × 107
3	8.4 × 106	1.3 × 107	6.6 × 106	2.1 × 107
4	1.7 × 107	2.6 × 107	8.0 × 106	1.1 × 107
Mean	(9.2 ± 5.8) × 106	(1.5 ± 1.0) × 107	(1.2 ± 0.7) × 107	(1.5 ± 0.5) × 107
Mean (n = 16)	(1.2 ± 0.7) × 107