FIG. 5.
Survival of mice passively immunized with 1-dose postvaccination immune serum followed by challenge with H7 wt viruses. Groups of five naïve mice received a 1:2 (▪) or 1:10 (○) dilution of 1-dose postvaccination immune serum by i.p. injection a day before challenge with 105 TCID50 of the homologous H7N7 NL/03 wt or heterologous H7N3 ck/BC/04 wt, H7N3 tk/EG/63 wt, or H7N1 tk/Italy/99 wt virus. Nonimmune serum (⋄) was administered to the control group. Mice were monitored daily for 14 days, and percent survival over the course of the observation is shown.