About Us: Researchers (PDRA/ Tenure Track Fellows)

Dan Hungerford, NIHR Post-doctoral Research Fellow and Tenure Track Fellow


Dan is an infectious disease epidemiologist with expertise in gastrointestinal infections and vaccines, with an interest in health inequalities. Dan holds a NIHR Post-doctoral Fellowship, and was recently appointed to a Tenure Track Fellowship position within the NIHR HPRU in Gastrointestinal Infections. During his career he has worked across academia, Public Health England and the NHS. Dan’s NIHR Fellowship is multi-disciplinary, combining epidemiology, laboratory science and modelling to predict risk of rotavirus diarrhoea in vaccinated children. Dan is also the epidemiologist for the European Rotavirus Surveillance Network (EuroRotaNet) and is leading the field work for the Liverpool household COVID-19 cohort study, COVID-LIV. Dan has 25+ peer-reviewed publications and has contributed to multiple externally funded research projects (totalling £2 Million to date).

His work spans across Themes 1, 2 and 4.

Suzie Rotheram, Post-doctoral research fellow


Suzie Rotheram is a postdoctoral fellow for the NIHR Health Protection Research Unit in Gastrointestinal Infections based in the department of Public Health, Policy and Systems at the University of Liverpool. Her PhD took an ethnographic approach to understanding inequalities in GI infections in families with young children. Her current project is using the gastrointestinal infection Shiga-toxin producing Escherichia coli (STEC) as a lens to understand how local environmental health protection systems can better address inequalities in gastrointestinal infection risk and consequences, given the context of austerity and the COVID-19 pandemic. Before starting her postgraduate studies Suzie worked as a vet in clinical practice and is a Bristol veterinary school graduate.

Xingna Nina Zhang, Post-doctoral research fellow


Nina is a postdoctoral fellow with expertise in spatial statistics and modelling based in the department of Public Health, Policy and Systems at the University of Liverpool. She did her PhD in Advanced Quantitative Methods in Human Geography in University of Bristol. She then worked in London School of Economics and Political Science as a postdoctoral researcher before joining University of Liverpool. She is interested in developing place-based indicators of GI infection and consolidating evidence on drivers of high GI disease burden in disadvantaged communities to tackle GI health inequalities. She will use spatial data resources to understand the higher burden of GI infection in more deprived places and its relationship to ethnicity and foreign travel for the NIHR Health Protection Research Unit in Gastrointestinal Infections.

Her work is across both Themes 1 and 2.

David Greig, Healthcare Scientist/Bioinformatician



David is a Bioinformatician/Healthcare Scientist at the Gastrointestinal Bacteria Reference Unit (GBRU) at Public Health England and is also completing a part-time PhD with the Roslin Institute, University of Edinburgh. David’s main duties include maintenance and development of bioinformatics pipelines and data analysis on whole genome sequencing data of gastrointestinal pathogens. He is working of the validation of Oxford Nanopore Technologies for the investigation of outbreaks of Shiga-toxin producing Escherichia coli (STEC) O157:H7 in humans to both better understand the genome plasticity of STEC O157:H7 and assess this technology’s applicability for epidemiological investigations. 

His work spans across both Theme 3 and 4.

Matthew Moore, Post-doctoral research fellow



Matt is a postdoctoral fellow with the Health Protection Research Unit in Gastrointestinal Infections, based within the School of Life Sciences, University of Warwick. Matt’s research experience spans his doctoral work on the comparative genomics of Pseudomonas aeruginosa, to postdoctoral work on the reconstruction of ancestral eukaryote genomes, to his most recent work with Clostridioides difficile. Working as a bioinformatician and postdoctoral computational biologist with the Modernising Medical Microbiology Consortium he worked to develop methods that enable rapid comparison of thousands of C. difficile genomes. Within HPRU themes 3 and 4 Matt will focus on developing scalable comparative methods for clinical and public health microbial genomics, developing inferential methods to discern the evolutionary forces shaping gastrointestinal pathogen genomes and the leveraging of genomic data towards source, phenotype and clinical outcome attribution.

Dana Sumilo, Post-doctoral research fellow