Venexia Walker

Dr. Venexia Walker is a Senior Lecturer at the University of Bristol's Bristol Medical School (PHS) and affiliated with the MRC Integrative Epidemiology Unit. She also holds a position at the University of Pennsylvania's Perelman School of Medicine. Her research focuses on epidemiological methods, particularly Mendelian randomization and pharmacoepidemiology, with applications to cardiovascular disease, drug safety, and Alzheimer’s prevention. She leads studies using large-scale electronic health records, such as the OpenSAFELY platform, to investigate disease mechanisms and public health impacts of interventions.

Her work highlights causal relationships between genetic traits and complex diseases, with notable contributions to understanding COVID-19-associated thrombosis, drug repurposing strategies, and the efficacy of vaccines. She collaborates extensively with global researchers, including experts in biostatistics (e.g., Jonathan Sterne, George Davey Smith) and genetic epidemiology.

Key research themes include:

• Genetic risk factors for cardiometabolic disorders
• Causal inference using Mendelian randomization
• Post-COVID-19 long-term health consequences
• Antihypertensive drug effects on neurodegenerative outcomes

Her publications span over 15 years, with recent emphasis on vaccine effectiveness and leveraging national health data for population-level insights. She contributes to both methodological advancements and applied epidemiological studies.