1. A method for developing an agent-based simulation system for a host-pathogen relationship, comprising: a) identifying a plurality of biological events associated with a pathogen's invasion of a host, b) identifying for each biological event, at least one agent associated with the event, c) identifying at least one action for each agent, d) identifying at least one interaction between agents, and e) simulating a temporal course of said host-pathogen relationship using said plurality of biological events, said agents associated with said biological events, said identified at least one action for each agent, and said identified at least one interaction between agents, wherein said simulation is accomplished using an agent-based simulation system, and f) displaying the results of the simulation.