Trystan Leng

Trystan is an infectious disease epidemiologist and mathematical modeller. He joined Lancaster and CHICAS in 2025 to undertake a Wellcome Early Career Award fellowship. His current research focuses on understanding the impact of school-level pathogen control strategies, with impact defined broadly.

In previous roles he has used modelling to evaluate a range of public health interventions, including the cost-effectiveness of vaccination for gonorrhoea control, the cost-effectiveness of HIV pre-exposure prophylaxis, the impact of rapid SARS-CoV-2 testing in schools, and the impact of social bubbling as a SARS-CoV-2 lockdown exit strategy. He obtained his PhD, on network approaches to modelling epidemics in human populations, from the University of Warwick in 2021.

More generally, he is interested in outbreak control in structured populations, how these population structures influence epidemic dynamics and intervention effectiveness, and how/whether structural assumptions in models impact their predictions. He is also increasingly interested in understanding the broader societal impacts of epidemic control and how best to incorporate these impacts into epidemiological/health-economic frameworks to inform policy.