She looked to avoid pandemics by identifying high-risk shipping and air traffic routes. She worked on a computer model that could help government officials in the United States better assess which passengers are likely to suffer from infectious disease and virus outbreaks, and to help them decide where and when to screen passengers. Her models make use of air travel data, the suitability of habitats to vectors, the local transmission of a virus and passenger air travel data. She used the model to analyse the 2015–16 Zika virus epidemic in the Americas.