Figure 3From: Virulence of H5N1 virus in mice attenuates after in vitro serial passagesSurvival rates of BALB/c mice infected with VN1194-W, VN1194-P and other variants. Six to 8-week-old, 15-17 g femal mice with 10 in each group were infected i.n. with 100 pfu (A-C) and i.v. with 50 pfu (D).Back to article page