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Body weight of Lewis rats infected with aerosolized RVFV. Groups of six to eight female Lewis rats were infected with RVFV by the aerosol route at four doses plus uninfected controls. (A) 1.5 pfu/rat; (B) 30 pfu/rat; (C) 350 pfu/rat; (D) 4400 pfu/rat. The y-axis of each graph displays the change in weight of individual animals relative to the average weight of the uninfected control group (n = 6). Rats that succumbed to infection are shown in red; survivors are shown in black.
