1. A system for predicting transmission of an infectious agent via air travel, comprising: a) a database, said database containing air passenger travel data for air travel between origin cities and destination cities, said air passenger travel data including: frequency of flights from said origin cities to said destination cities, number of passengers traveling from said origin cities to said destination cities, number of direct non-stop flights from said origin cities to said destination cities, total passenger traffic for said origin and said destination cities, and corresponding date stamps for all said air passenger travel data; b) a modeling engine operative to determine probability of infection of an individual destination city from an individual origin city via air travel by mapping said air passenger travel data with the probability of emergence, propagation and infection for said infectious agent and producing one or more maps of times and locations for dissemination of said infectious agent; and c) a reporting engine operative to produce a probability report for an infection outbreak in said individual destination city from said individual origin city over a fixed time period based on said maps produced by said modeling engine.