Conclusions

I introduce two new plots for representing infectious disease outbreaks. Case tree plots depict spillover events and subsequent transmission of human to human cases of a zoonotic disease over time. Checkerboard plots also represent case clusters over time, but do not attempt to construct transmission trees. These plots visually represent important outbreak dynamics, like the basic reproduction number. They also allow for underutilized analyses like case fatality risk stratified by generation. These plots provide epidemiologists with additional means to visualize and understand zoonotic disease.