Yiyuan Zhang

PhD, MSc, BSc

Medical Statistician

I joined the Oxford Vaccine Group Department of Paediatrics in 2020 after I obtained my PhD and MSc degrees in Statistics at the University of Warwick.

Currently, I work on vaccine studies, including typhoid, paratyphoid, Nipah virus, and Crimean-Congo haemorrhagic fever vaccine trials.

My PhD project is modelling telemonitored physical activity based on hidden Markov modelling with application to analysing circadian rhythm in shift workers.

Recent publications

The association between vaccine coverage and herd protection: exploratory analyses of a cluster-randomised trial of Vi conjugate vaccine

Zhang Y. et al, (2026), eClinicalMedicine, 94, 103863 - 103863

The effect of pneumococcal conjugate vaccine and pneumococcal polysaccharide vaccine on nasopharyngeal colonisation following human infection challenge with serotype 3 and serotype 6B (PREVENTING PNEUMO 2): a double-masked, randomised, controlled, phase 4 trial.

Liatsikos K. et al, (2026), Lancet Microbe, 7

Persistence of Immune Responses 5 Years After Vaccination With a Single Dose of Typhoid Conjugate Vaccine (TCV) in Nepalese Children

Pant D. et al, (2026)

Eight-Year Vaccine Protection Following a Single Dose of VI-Tetanus Toxoid Conjugate Vaccine in Nepali Children: Extended Follow-Up of the TyVAC Nepal Randomised Controlled Trial

Pant D. et al, (2026)

Impact of Dosing Interval on Immunogenicity Following a Heterologous Typhoid Conjugate Vaccine Booster in Nepalese Children: An Observational Study

Zhang Y. et al, (2026)

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