These aggressive warriors look like nail bombs. The Knight can move from one corner to the other of any 2 x 3 rectangle of squares. The Knight is also the only piece that can jump over any other chess pieces. In OUTBREAK they are Hepatitis B.
Hepatitis B is a contagious liver disease that ranges in severity from a mild illness lasting a few weeks to a serious, lifelong illness. It is spread when blood, semen, or other body fluid infected with the Hepatitis B virus enters the body of a person who is not infected.