Sang Froid in a time of trouble: is a vaccine against HIV possible?

Table 4 Estimates of titers of neutralizing antibodies required for sterile protection against HIV.

Investigator	Titer	SN End Point	Species	Remarks
Trkola et al [58]	1/200	70%	Human	Acute infection
Parren et al [60]	1/400	90%	Macaques	SHIV Challenge
Nishimura et al. [61]	1/38	100%	Macaques	SHIV Challenge
Mascola et al [50, 52]	1/50, 1/29–1/88	90%	Macaques	SHIV Challenge
Trkola et al [59]	1/400	90%	Human	Rebound after HAART