GLEAM produces realistic simulations of the global spread of infectious diseases. It integrates three layers: real-world data on the global population; real-world data on the mobility of this population; an individual based stochastic mathematical model of the infection dynamics. Read more about the organisation and their tools at Gleamviz.org
This time luck was on our side, Gleam produces great looking visuals (and got recognised for it by many, such as Wired).