TABLE 2.

Neutralizing antibody data from control animals at various weeks after challenge with SIVmac239

Animal	wk postchallenge	Neutralizing antibody titera to:
		SIVmac251	SIVmac239
90069	0	<20	<20
	3	<20	<20
	6	856	<20
	10	1,755	<20
90131	0	<20	<20
	3	<20	<20
	6	<20	<20
	10	<20	<20
92050	0	<20	<20
	3	42	<20
	6	919	<20
	10	651	<20
92080	0	20	<20
	3	341	<20
	6	2,139	<20
	10	1,641	<20
97086	0	25	<20
	3	419	<20
	6	8,010	<20
	10	9,952	<20

^aReciprocal serum dilution at which 50% of CEMx174 cells were protected from virus-induced killing, as measured by neutral red uptake. SIVmac251 was laboratory adapted.