Research Fellow


Dr Aaron Karat is a Research Fellow in the Institute of Global Health and Development. 

  • Overview
  • Research Interests
  • Teaching and Learning

Dr Aaron Karat is a physician and global health researcher interested in health and data systems, development and evaluation of clinical and systems interventions, mortality measurement in low- and middle-income settings, and evidence synthesis for decision-making.

Professional Social Media:

Affiliations/Memberships to Other Organisations:

Aaron has been doing research in South Africa since 2012, primarily around tuberculosis (TB) and HIV. His doctoral work focused on the use of minimally-invasive autopsy (MIA) and verbal autopsy (VA) to estimate causes of death in adults with advanced HIV in South Africa. He has worked across a range of epidemiological and clinical TB studies, including a number conducted in the demographic surveillance area of the Africa Health Research Institute (AHRI). He was a senior member of the team conducting World Health Organization-commissioned systematic reviews to inform the update of global guidelines on TB infection prevention and control (IPC).

Aaron is currently working under Dr Karina Kielmann conducting qualitative research for the IMPACT study, which aims to develop and trial a manualised intervention to improve adherence to treatment for TB in the United Kingdom. He also works on various aspects of Umoya omuhle, a large, multidisciplinary study taking a ‘whole-systems’ approach to TB IPC in South Africa.

Active research interests:

  • Tuberculosis transmission
  • Occupational health
  • Underserved and vulnerable populations
  • Prison health
  • Clinical interventions to reduce mortality in adults with HIV
  • Estimation of cause of death for community deaths in low- and middle-income settings
  • Use of system dynamics and other methods to map and model complexity, , develop interventions, and make policy
  • Systematic reviews and rapid synthesis of qualitative and quantitative data for decision-making
  • Rapid evaluation

Research Methods:

  • Mortality measurement (minimally invasive autopsy, clinic cause of death assignment, verbal autopsy)
  • quantitative and qualitative data synthesis for decision-making and intervention development
  • Complexity mapping and modelling

Aaron contributes to the Masters’ module on Global Health Research at QMU. He is also a tutor for the distance-learning MSc in Infectious Diseases at LSHTM, where he supervises MSc dissertations.