I am a clinician researcher with the University of Oxford, based at the KEMRI-Wellcome Trust Research Programme, Kenya. My research group addresses aetiology, clinical features and risks for mortality of serious infections in infants and children; mechanistic studies including microbiology, antimicrobial resistance, immunology, metabolomics and proteomics; and clinical trials, including early pharmacokinetics and safety trials, and large international multicentre phase III trials on antimicrobial and nutritional interventions in vulnerable paediatric populations. I advise the WHO and chair several external clinical trial DSMBs. I am the Founder and co-Director of the Childhood Acute Illness & Nutrition (CHAIN) Network of partners in Africa (Kenya, Uganda, Malawi, Burkina Faso), South Asia (Pakistan, Bangladesh), UK, USA, Canada and The Netherlands. The CHAIN Network is headquartered in Nairobi, Kenya. We aim to better understand infectious, immune, metabolic, nutritional, health systems and social pathways to childhood mortality to identify actionable interventions through an epidemiological cohort, systems biology analysis pipeline, social science platform and a multicentre clinical trials platform. www.chainnetwork.org www.kemri-wellcome.org https://www.tropicalmedicine.ox.ac.uk/team/james-berkley