TABLE 2.

Average infectivity and immunogenicity of wt DEN1WP and DEN1mutF

Infecting virus	No. of days viremica	Peak titer (avg PFU eq/ml × 103) [range]	Avg PRNT50−1 at day 30 [range]
wt DEN1WP	4.6 (4-7)	1.52 [0.4-4.2]	320 [160-640]
DEN1mutF	1.1 (0-2)	0.2 [<0.02-0.4]	240 [80-640]

^aAverage (range) for all nine monkeys per group, as determined by RT-PCR.