Joshua Fieggen
Research Assitant
Biography
Josh is a research assistant in the PSI working on emerging infections in the epidemic diseases clinical research group (ERGO). He mostly works supporting Dr Amanda Rojek’s work on developing a global harmonised trial for the treatment of filoviruses (such as Ebola and Marburg). At the PSI he also researches emerging pathogen eradication, and clinical host responses to high consequence pathogens.
Josh has a background as a medical doctor from South Africa. He completed his MBChB and MPH at the University of Cape Town and has previous experience in HIV care and research. He is currently undertaking a DPhil in machine learning for biomarker discovery in the Computational Health Informatics Lab in the Department of Engineering Sciences and is funded by a Rhodes Scholarship.
Recent publications
Beyond event-rate enrichment: proteomic risk scores for mechanism-aware prevention trial design
Preprint
Fieggen J. et al, (2026)
MedMisBench: Measuring Epistemic Resilience of LLMs Under Misleading Medical Context
Preprint
Zhou H. et al, (2026)
Early plasma proteomic alterations precede amyloidosis diagnosis, reflecting cardiac and immune dysregulation
Preprint
Hasheminasab SA. et al, (2026)
Digital morphine: why AI scribes are symptomatic relief for a broken system
Journal article
Segal B. et al, (2026), BMJ Digital Health & AI, 2, e000030 - e000030
Characteristics of Individuals With Advanced HIV Disease and Risk Factors for Mortality in a Contemporary Cohort in South Africa
Journal article
Fieggen J. et al, (2026), JAIDS Journal of Acquired Immune Deficiency Syndromes, 101, 30 - 40