individual human behavior self-initiated travel avoidance behavior Individual human behavior that involves either 1) remaining in some susceptible population or some exposed population or 2) human movement away from or around an infectious population, in order to avoid being participant in some infection acquisition. Individual human behavior that involves either 1) remaining in some susceptible population or some exposed population or 2) human movement away from or around an infectious population, in order to avoid being participant in some infection acquisition. William R. Hogan Matthew Diller