Dr Joris Hemelaar
- Adverse perinatal outcomes associated with maternal HIV infection and antiretroviral therapy: systematic review and meta-analysis
- Adverse perinatal outcomes associated with antiretroviral therapy for HIV: systematic review and individual participant data meta-analysis
- Adverse perinatal outcomes in women living with HIV in South Africa
- An 'omics' approach to investigate adverse perinatal outcomes in HIV-positive women
- An “omics” approach to investigate adverse perinatal outcomes in HIV-positive women
- Global molecular epidemiology of HIV in 1990-2021
- Global molecular epidemiology of HIV in 1990-2025
- Infectious Disease Epidemiology Unit
BM BCh (Oxon) BSc (Hons) MSc PGDip DPhil (Oxon) MRCOG
Senior Clinical Research Fellow
- Honorary Consultant Obstetrician, Oxford University Hospital NHS Foundation Trust
- Associate Editor, Frontiers in Microbiology
- Principal Investigator
- University Research Lecturer
Dr Hemelaar obtained his BSc and MSc (cum laude) in Molecular Biology and Genetics at Leiden University, The Netherlands (1997). He then completed a DPhil in Molecular Immunology with Prof Sir Andrew McMichael FRS at the Weatherall Institute of Molecular Medicine and Trinity College, Oxford (2001). This was followed by post-doctoral research at the Harvard Medical School, Boston, USA. He obtained his BM BCh medical degree at Magdalen College, Oxford (2007) and completed his Specialty Training in Obstetrics and Gynaecology in 2019, during which time he was an Academic Clinical Fellow and Clinical Lecturer in Oxford. In 2021 he was appointed as Senior Clinical Research Fellow in NPEU/NDPH and Honorary Consultant Obstetrician at the John Radcliffe Hospital.
Dr Hemelaar’s research focuses on the association of maternal HIV infection and antiretroviral therapy with adverse perinatal outcomes, such as preterm birth and low birthweight. The aims are to accurately estimate the burden of adverse pregnancy outcomes associated with maternal HIV infection and antiretroviral therapies, and to elucidate the mechanisms underlying these pathologies, with a view to developing predictive, preventative and interventional strategies.
A second line of research concerns the global molecular epidemiology of HIV-1. Global HIV-1 genetic diversity and evolution form a major challenge to treatment and prevention efforts and impacts HIV transmission, pathogenesis, diagnosis, and treatment. Global HIV diversity forms a major obstacle to HIV vaccine development. He conducts large studies to determine the global spread of HIV strains, which is crucial for the design, testing and deployment of HIV vaccines.
Perinatal outcomes associated with combination antiretroviral therapy compared with monotherapy.
Portwood C. et al, (2023), AIDS, 37, 489 - 501
Adverse perinatal outcomes associated with antiretroviral therapy in women living with HIV: a systematic review and meta-analysis
Portwood C. et al, (2023), Frontiers in Medicine
Perinatal outcomes associated with combination antiretroviral therapy compared to monotherapy: systematic review and meta-analysis
HEMELAAR J. et al, (2022), AIDS Journal
Trends in management and outcomes of pregnant women living with HIV between 2008–2013 and 2014–2019: A retrospective cohort study
Brandon O. et al, (2022), Frontiers in Medicine, 9
Adverse perinatal outcomes associated with timing of initiation of antiretroviral therapy: Systematic review and meta-analysis.
Sexton H. et al, (2022), HIV Med