Table 1. Challenge of DENV clinical isolates in IFN-α/β/γR KO mice.

Virus	Titer (FFU)	Number a	% Survival	Period b
DV3-2	3.3×105	4	100	-c
DV3-3	3.1×105	5	100	-c
DV3-4	8.3×105	5	40	25–32
P12/08	2.0×105	3	0	9–24

^a Numbers of mice used for challenge.

^b Period indicates the days when mice condition reached the end point.

^c All mice survived until days 42 post-infection without symptom.