How do infectious diseases spread? What is the best way to stop them? How can mathematical models help? Istvan’s research is concerned with the mathematical modelling of infectious disease transmission. This involves the formulation and analysis of models ranging from differential equations to the complex simulations. A considerable part of his research focuses on real-life applications and involves the use of data to build and analyse complex contact networks. Through the use of theory and applications, Istvan aims to better understand how properties at the individual level impact on disease invasion, spread and control.