Figure 1From: A single immunization with HA DNA vaccine by electroporation induces early protection against H5N1 avian influenza virus challenge in mice Bodyweight changes after challenge. Mice were immunized once with 10 μg (A), 50 μg (B) and 100 μg (C) of HA DNA 3, 5 and 7 days, respectively, before the lethal virus infection. Bodyweight changes were observed for 21 days after infection.Back to article page