Kaplan-Meier survival chart showing HuMAb-154 treatment following SEB challenge improves survival of mice. Time to death was delayed in mice treated with HuMAb-154 shortly after SEB challenge. Mice were challenged with 10 μg of SEB and HuMAb-154 was administered at time points following SEB challenge as indicated. Data are cumulative results of three studies (n = 30 for each group). Survival of each HuMAb-154 treatment group was significant (P < 0.0001) as compared to the untreated group.