A. Heekes

Most-cited papers

1. Risk Factors for Coronavirus Disease 2019 (COVID-19) Death in a Population Cohort Study from the Western Cape Province, South Africa

   Andrew Mary-Ann Hannah Muzzammil Erna Ziyanda Virginia Ha Boulle Davies Hussey Ismail Morden Vundle Zweigent, A. Boulle, M. Davies, H. Hussey +261 more

   2020Clinical Infectious Diseases377 citations Open access

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2. Risk factors for COVID-19 death in a population cohort study from the Western Cape Province, South Africa

   A. Boulle, M. Davies, H. Hussey, M. Ismail +46 more

   2020Clinical Infectious Diseases167 citations Open access

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3. Data Centre Profile: The Provincial Health Data Centre of the Western Cape Province, South Africa

   A. Boulle, A. Heekes, N. Tiffin, Mariette Smith +14 more

   2019International Journal of Population Data Science157 citations Open access

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4. Outcomes of laboratory-confirmed SARS-CoV-2 infection in the Omicron-driven fourth wave compared with previous waves in the Western Cape Province, South Africa

   M. Davies, R. Kassanjee, Petro Rosseau, E. Morden +43 more

   2022medRxiv105 citations Open access

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5. Outcomes of laboratory-confirmed SARS-CoV-2 infection during resurgence driven by Omicron lineages BA.4 and BA.5 compared with previous waves in the Western Cape Province, South Africa

   M. Davies, E. Morden, P. Rousseau, J. Arendse +44 more

   2022International Journal of Infectious Diseases53 citations Open access

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6. Outcomes of laboratory‐confirmed SARS‐CoV‐2 infection in the Omicron‐driven fourth wave compared with previous waves in the Western Cape Province, South Africa

   M. Davies, R. Kassanjee, P. Rousseau, E. Morden +42 more

   2022Tropical medicine & international health36 citations Open access

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7. Assessing the clinical severity of the Omicron variant in the Western Cape Province, South Africa, using the diagnostic PCR proxy marker of RdRp target delay to distinguish between Omicron and Delta infections – a survival analysis

   H. Hussey, M. Davies, A. Heekes, C. Williamson +23 more

   2022medRxiv28 citations Open access

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8. Utility of digitising point of care HIV test results to accurately measure, and improve performance towards, the UNAIDS 90-90-90 targets

   Nisha Jacob, B. Rice, E. Kalk, A. Heekes +3 more

   2020PLoS ONE25 citations Open access

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9. The cyclical cascade of HIV care: Temporal care engagement trends within a population-wide cohort

   J. Euvrard, Venessa Timmerman, C. Keene, F. Phelanyane +5 more

   2024PLoS Medicine24 citations Open access

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10. Self-enrolment antenatal health promotion data as an adjunct to maternal clinical information systems in the Western Cape Province of South Africa

    A. Heekes, N. Tiffin, Pierre Dane, T. Mutemaringa +5 more

    2018BMJ Global Health23 citations Open access

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11. Factors associated with vertical transmission of HIV in the Western Cape, South Africa: a retrospective cohort analysis

    K. Anderson, E. Kalk, A. Heekes, F. Phelanyane +8 more

    2024Journal of the International AIDS Society18 citations Open access

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12. Cohort profile: the Western Cape Pregnancy Exposure Registry (WCPER)

    E. Kalk, A. Heekes, A. Slogrove, F. Phelanyane +13 more

    2022BMJ Open16 citations Open access

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13. Safety and Effectiveness of Isoniazid Preventive Therapy in Pregnant Women Living with Human Immunodeficiency Virus on Antiretroviral Therapy: An Observational Study Using Linked Population Data

    E. Kalk, A. Heekes, U. Mehta, R. de Waal +6 more

    2020Clinical Infectious Diseases16 citations Open access

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14. Record linkage for Routinely Collected Health Data in an African Health Information Exchange.

    T. Mutemaringa, A. Heekes, A. Boulle, N. Tiffin

    2022International Journal of Population Data Science15 citations Open access

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15. Safety and Effectiveness of Isoniazid Preventive Therapy in HIV-Positive Pregnant Women on Art: An Observational Study using Linked Population Data.

    E. Kalk, A. Heekes, U. Mehta, R. de Waal +6 more

    2020Clinical Infectious Diseases15 citations Open access

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16. Maternal and birth outcomes in pregnant people with and without HIV in the Western Cape, South Africa: population-based cohort study

    A. Slogrove, Andisiwe Bovu, Shani T. de Beer, F. Phelanyane +10 more

    2023AIDS (London)14 citations Open access

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17. The effect of HIV and antiretroviral treatment on pregnancy rates in the Western Cape province of South Africa.

    L. Johnson, T. Mutemaringa, A. Heekes, A. Boulle

    2019Journal of Infectious Diseases11 citations Open access

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18. Evaluation of a public COVID-19 dashboard in the Western Cape, South Africa: a tool for communication, trust, and transparency

    M. Ismail, E. Morden, H. Hussey, M. Paleker +11 more

    2022BMC Public Health8 citations Open access

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19. Higher mortality associated with the SARS-CoV-2 Delta variant in the Western Cape, South Africa, using RdRp target delay as a proxy

    H. Hussey, M. Davies, A. Heekes, C. Williamson +21 more

    2021medRxiv7 citations Open access

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20. COVID-19 vaccine uptake and effectiveness by time since vaccination in the Western Cape province, South Africa: An observational cohort study during 2020–2022

    R. Kassanjee, M. Davies, A. Heekes, H. Mahomed +20 more

    2024medRxiv5 citations Open access

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21. Comparison of paediatric infectious disease deaths in public sector health facilities using different data sources in the Western Cape, South Africa (2007–2021)

    K. Kehoe, E. Morden, T. Jacobs, N. Zinyakatira +10 more

    2023BMC Infectious Diseases5 citations Open access

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22. Lower respiratory tract infection admissions and deaths among children under 5 years in public sector facilities in the Western Cape Province, South Africa, before and during the COVID-19 pandemic (2019 - 2021).

    K. Kehoe, E. Morden, N. Zinyakatira, A. Heekes +7 more

    2024South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde4 citations Open access

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23. Higher mortality associated with the SARS-CoV-2 Delta variant in the Western Cape, South Africa, using RdRp target delay as a proxy: a cross-sectional study.

    H. Hussey, M. Davies, A. Heekes, C. Williamson +21 more

    2022Gates Open Research4 citations Open access

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24. Population-based prevalence of congenital defects in a routine sentinel-site based surveillance system in the Western Cape, South Africa

    E. Kalk, A. Heekes, Diane Lavies, Lizel Jacobs +9 more

    2024Birth Defects Research3 citations

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25. COVID-19 Vaccine Uptake and Effectiveness by Time since Vaccination in the Western Cape Province, South Africa: An Observational Cohort Study during 2020–2022

    R. Kassanjee, M. Davies, A. Heekes, H. Mahomed +16 more

    2024Vaccines3 citations Open access

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26. Programmatic review of safety and effectiveness of isoniazid preventive therapy in HIV-infected pregnant women on ART in routine care

    E. Kalk, A. Heekes, U. Mehta, R. de Waal +6 more

    2018Reproductive Toxicology3 citations

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27. High incidence of tuberculosis in young children living with HIV in the Western Cape, South Africa

    K. Anderson, H. Rabie, Brian S. Eley, L. Frigati +7 more

    2025Journal of Acquired Immune Deficiency Syndromes2 citations Open access

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28. Can routine antenatal data be used to assess HIV antiretroviral therapy coverage among pregnant women? Evaluating the validity of different data sources in the Western Cape, South Africa

    Nisha Jacob, Brian Rice, A. Heekes, Leigh F. Johnson +3 more

    2024PLoS ONE2 citations Open access

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29. Record linkage for routinely collected health data in an African health information exchange

    T. Mutemaringa, A. Heekes, Mariette Smith, Andrew Boulle +1 more

    2023International Journal of Population Data Science2 citations Open access

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30. Epidemiology and outcomes of SARS-CoV-2 infection associated with anti-nucleocapsid seropositivity in Cape Town, South Africa

    H. Hussey, H. Vreede, M. Davies, A. Heekes +21 more

    2022medRxiv2 citations Open access

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31. Consolidating strategic information to monitor progress against the UNAIDS 90–90–90 targets: evaluating the operational feasibility of an electronic HIV testing register in Cape Town, South Africa

    Nisha Jacob, B. Rice, E. Kalk, A. Heekes +5 more

    2020BMC Health Services Research2 citations Open access

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32. Digitising point of care HIV test results to accurately measure, and improve performance towards, the UNAIDS 90-90-90 targets

    Nisha Jacob, B. Rice, E. Kalk, A. Heekes +3 more

    20192 citations Open access

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33. Mother‐child dyads living with HIV in the Western Cape, South Africa: Undetectable = Undetectable?

    K. Anderson, H. Rabie, Brian S. Eley, L. Frigati +9 more

    2025Journal of the International AIDS Society1 citations Open access

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34. The impact of evolving maternal antiretroviral therapy guidelines on vertical transmission of HIV in the Western Cape, South Africa

    Nisha Jacob, E. Kalk, A. Heekes, F. Phelanyane +4 more

    2025medRxiv1 citations Open access

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35. Exploring the validity of routine individuated service data for antenatal HIV surveillance in the Western Cape

    Nisha Jacob, Brian Rice, A. Heekes, Leigh F. Johnson +4 more

    2025BMC Infectious Diseases1 citations Open access

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36. HIV Drug Resistance in Newly Diagnosed Young Children in the Western Cape, South Africa

    K. Anderson, G. V. van Zyl, Nei-Yuan Hsiao, M. Claassen +10 more

    2024The Pediatric Infectious Disease Journal1 citations Open access

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37. SARS-CoV-2 seroepidemiology in Cape Town, South Africa, and implications for future outbreaks in low-income communities

    H. Hussey, H. Vreede, M. Davies, A. Heekes +20 more

    2024PLOS Global Public Health1 citations Open access

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38. Outcomes of laboratory-confirmed SARS-CoV-2 infection during resurgence driven by Omicron lineages BA.4 and BA.5 compared with previous waves in the Western Cape Province, South Africa

    M. Davies, E. Morden, Petro Rosseau, J. Arendse +44 more

    2022medRxiv1 citations Open access

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39. Consolidated Person Level Health Data Improve Tuberculosis Surveillance and Patient Care

    Mariette Smith, A. Heekes, A. von Delft, T. Mutemaringa +2 more

    2020International Journal of Population Data Science1 citations Open access

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40. Beyond Interoperability with The Single Patient Viewer: A Clinical Portal to Access Integrated Patient Records

    Rosemary Foster, A. Heekes, H. Hussey, Mariette Smith +5 more

    20201 citations Open access

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41. Infectious-cause hospitalisation in a province-wide cohort of children with antenatal HIV exposure compared to children without HIV exposure

    Shani T. de Beer, F. Phelanyane, S. Ingle, A. Slogrove +7 more

    2025AIDS (London)0 citations Open access

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42. Correction: SARS-CoV-2 seroepidemiology in Cape Town, South Africa, and implications for future outbreaks in low-income communities

    H. Hussey, H. Vreede, M. Davies, A. Heekes +20 more

    2025PLOS Global Public Health0 citations Open access

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43. Developing a dashboard for surveillance of mental health admissions in the Western Cape Province of South Africa

    T. Mountford, A. Heekes, H. Hussey

    2025South African Health Review0 citations Open access

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44. Exploring the validity of routine individuated service data for antenatal HIV surveillance in the Western Cape

    Nisha Jacob, Brian Rice, A. Heekes, Leigh F. Johnson +4 more

    2024Research Square0 citations Open access

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45. The Retrospective Implementation of Standardized In Utero HIV Exposure Definitions Using Routinely Collected Public Sector Data Across the Western Cape Province, South Africa

    Shani T. de Beer, M. Davies, F. Phelanyane, H. E. Jones +8 more

    2024The Pediatric Infectious Disease Journal0 citations Open access

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46. South African experience consolidating person-level health data for both service and research in a single environment

    A. Boulle, A. Heekes, T. Mutemaringa, M. Smit +2 more

    20200 citations Open access

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47. Creating A Validation Dataset to Test Record Linkage Algorithms in A Province-Wide South African Health Information Exchange

    T. Mutemaringa, A. Heekes, Mariette Smith, N. Tiffin +1 more

    20200 citations Open access

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48. Digitising point of care HIV test 1 results to accurately measure, and 2 improve performance towards, the 3 UNAIDS 90-90-90 targets 4

    Nisha Jacob, B. Rice, E. Kalk, A. Heekes +4 more

    20190 citations

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