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L. Johnson · SciRah

Researcher profile · Semantic Scholar

L. Johnson

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L. Johnson — researcher profile on SciRah

h-index: 50
Works: 154
Citations: 8,669

Most-cited papers

Advancing global health and strengthening the HIV response in the era of the Sustainable Development Goals: the International AIDS Society—Lancet Commission
L. Bekker, G. Alleyne, S. Baral, J. Cepeda +43 more
2018The Lancet359 citations Open access
Semantic Scholar
Trends in life expectancy of HIV-positive adults on ART across the globe: comparisons with general population
G. Wandeler, L. Johnson, M. Egger
2016Current Opinion in HIV and AIDS347 citations Open access
Semantic Scholar
HIV and sex workers 2 Combination HIV prevention for female sex workers : what is the evidence ?
L. Bekker, L. Johnson, F. Cowan, C. Overs +3 more
2014219 citations
Semantic Scholar
Global estimates of children HIV exposed and uninfected in the evolving HIV epidemic: 2000 to 2018
A. Slogrove, K. Powis, L. Johnson, J. Stover +1 more
2019Lancet Global Health141 citations Open access
Semantic Scholar
Estimating the impact of antiretroviral treatment on adult mortality trends in South Africa: A mathematical modelling study
L. Johnson, M. May, R. Dorrington, M. Cornell +3 more
2017PLoS Medicine135 citations Open access
Semantic Scholar
Progress towards the 2020 targets for HIV diagnosis and antiretroviral treatment in South Africa
L. Johnson, R. Dorrington, Haroon Moolla
2017Southern African Journal of HIV Medicine135 citations Open access
Semantic Scholar
Building our youth for the future
L. Bekker, L. Johnson, M. Wallace, S. Hosek
2015Journal of the International AIDS Society127 citations Open access
Semantic Scholar
Adult gonorrhea, chlamydia and syphilis prevalence, incidence, treatment and syndromic case reporting in South Africa: Estimates using the Spectrum-STI model, 1990-2017
R. Kularatne, Ronelle Niit, J. Rowley, T. Kufa-Chakezha +4 more
2018PLoS ONE124 citations Open access
Semantic Scholar
Trends in knowledge of HIV status and efficiency of HIV testing services in sub-Saharan Africa (2000-2020): a modelling study of survey and HIV testing program data
Katia Giguère, J. Eaton, K. Marsh, L. Johnson +8 more
2020medRxiv116 citations Open access
Semantic Scholar
Rates of HIV testing and diagnosis in South Africa: successes and challenges
L. Johnson, T. Rehle, S. Jooste, L. Bekker
2015AIDS (London)107 citations Open access
Semantic Scholar
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
Semantic Scholar
The Effect of HIV Programs in South Africa on National HIV Incidence Trends, 2000–2019
L. Johnson, G. Meyer-Rath, R. Dorrington, A. Puren +3 more
2022Journal of Acquired Immune Deficiency Syndromes80 citations Open access
Semantic Scholar
Inflammatory cytokine biomarkers to identify women with asymptomatic sexually transmitted infections and bacterial vaginosis who are at high risk of HIV infection
L. Masson, Kelly B. Arnold, F. Little, K. Mlisana +9 more
2015Sexually Transmitted Infections71 citations Open access
Semantic Scholar
Developing WHO guidelines: Time to formally include evidence from mathematical modelling studies
M. Egger, L. Johnson, C. Althaus, Anna Schöni +3 more
2017F1000Research68 citations Open access
Semantic Scholar
A Comparison of South African National HIV Incidence Estimates: A Critical Appraisal of Different Methods
T. Rehle, L. Johnson, T. Hallett, M. Mahy +8 more
2015PLoS ONE68 citations Open access
Semantic Scholar
Twelve-year mortality in adults initiating antiretroviral therapy in South Africa
M. Cornell, L. Johnson, R. Wood, F. Tanser +6 more
2017Journal of the International AIDS Society63 citations Open access
Semantic Scholar
Changing the South African national antiretroviral therapy guidelines: The role of cost modelling
G. Meyer-Rath, L. Johnson, Y. Pillay, M. Blecher +6 more
2017PLoS ONE61 citations Open access
Semantic Scholar
The use of mathematical modeling studies for evidence synthesis and guideline development: A glossary
T. V. Porgo, S. Norris, G. Salanti, L. Johnson +4 more
2019Research Synthesis Methods56 citations Open access
Semantic Scholar
National HIV testing and diagnosis coverage in sub-Saharan Africa: a new modeling tool for estimating the ‘first 90’ from program and survey data
M. Maheu-Giroux, K. Marsh, Carla M. Doyle, Arnaud Godin +9 more
2019bioRxiv56 citations Open access
Semantic Scholar
Assessment of epidemic projections using recent HIV survey data in South Africa: a validation analysis of ten mathematical models of HIV epidemiology in the antiretroviral therapy era.
J. Eaton, Nicolas Bacaër, A. Bershteyn, V. Cambiano +12 more
2015Lancet Global Health55 citations Open access
Semantic Scholar
Optimal HIV testing strategies for South Africa: a model-based evaluation of population-level impact and cost-effectiveness
L. Johnson, Craig van Rensburg, C. Govathson, G. Meyer-Rath
2019Scientific Reports54 citations Open access
Semantic Scholar
Acceptability, safety, and patterns of use of oral tenofovir disoproxil fumarate and emtricitabine for HIV pre-exposure prophylaxis in South African adolescents: an open-label single-arm phase 2 trial.
K. Gill, L. Johnson, J. Dietrich, L. Myer +14 more
2020The Lancet Child & Adolescent Health53 citations Open access
Semantic Scholar
Prevalence, incidence and associated risk factors of STIs during pregnancy in South Africa
D. Nyemba, A. Medina-Marino, R. Peters, J. Klausner +4 more
2020Sexually Transmitted Infections53 citations Open access
Semantic Scholar
Prospects for HIV control in South Africa: a model-based analysis
L. Johnson, Calvin Chiu, L. Myer, M. Davies +4 more
2016Global Health Action51 citations Open access
Semantic Scholar
A Comparison of Two Mathematical Modeling Frameworks for Evaluating Sexually Transmitted Infection Epidemiology
L. Johnson, N. Geffen
2016Sexually Transmitted Diseases50 citations
Semantic Scholar
Cost-effectiveness of easy-access, risk-informed oral pre-exposure prophylaxis in HIV epidemics in sub-Saharan Africa: a modelling study
Andrew N. Phillips, A. Bershteyn, P. Revill, L. Bansi-Matharu +34 more
2022The Lancet HIV49 citations Open access
Semantic Scholar
Relative cost-effectiveness of long-acting injectable cabotegravir versus oral pre-exposure prophylaxis in South Africa based on the HPTN 083 and HPTN 084 trials: a modelled economic evaluation and threshold analysis
L. Jamieson, L. Johnson, B. Nichols, S. Delany-Moretlwe +3 more
2022The Lancet HIV48 citations Open access
Semantic Scholar
Naomi: a new modelling tool for estimating HIV epidemic indicators at the district level in sub‐Saharan Africa
J. Eaton, L. Dwyer-Lindgren, S. Gutreuter, M. O'Driscoll +32 more
2021Journal of the International AIDS Society48 citations Open access
Semantic Scholar
HIV services in sub-Saharan Africa: the greatest gap is men.
M. Cornell, Mandla Majola, L. Johnson, Vuyiseka Dubula-Majola
2021The Lancet47 citations
Semantic Scholar
An open‐label, randomized crossover study to evaluate the acceptability and preference for contraceptive options in female adolescents, 15 to 19 years of age in Cape Town, as a proxy for HIV prevention methods (UChoose)
K. Gill, A. Happel, T. Pidwell, A. Mendelsohn +15 more
2020Journal of the International AIDS Society43 citations Open access
Semantic Scholar
Summarizing the results and methods of the 2019 Joint United Nations Programme on HIV/AIDS HIV estimates
Kelsey K Case, L. Johnson, M. Mahy, K. Marsh +2 more
2019AIDS (London)42 citations Open access
Semantic Scholar
Prevalence of curable sexually transmitted infections and bacterial vaginosis during pregnancy in sub-Saharan Africa: A systematic review and meta-analysis
D. Nyemba, E. Haddison, Colin Wang, L. Johnson +2 more
2021Sexually Transmitted Infections41 citations Open access
Semantic Scholar
Modelling of HIV prevention and treatment progress in five South African metropolitan districts
C. van Schalkwyk, R. Dorrington, Thapelo Seatlhodi, Claudia P. Velasquez +2 more
2021Scientific Reports41 citations Open access
Semantic Scholar
Modelling the potential impact of providing pre-exposure prophylaxis (PrEP) in pregnant and breastfeeding women in South Africa
D. J. Joseph Davey, L. Bekker, Yolanda Gomba, T. Coates +2 more
2019AIDS (London)41 citations Open access
Semantic Scholar
A comparison of death recording by health centres and civil registration in South Africans receiving antiretroviral treatment
L. Johnson, R. Dorrington, R. Laubscher, C. Hoffmann +8 more
2015Journal of the International AIDS Society40 citations Open access
Semantic Scholar
HIV epidemic drivers in South Africa: A model-based evaluation of factors accounting for inter-provincial differences in HIV prevalence and incidence trends
L. Johnson, R. Dorrington, Haroon Moolla
2017Southern African Journal of HIV Medicine39 citations Open access
Semantic Scholar
Do increasing rates of loss to follow-up in antiretroviral treatment programs imply deteriorating patient retention?
L. Johnson, J. Estill, O. Keiser, M. Cornell +5 more
2014American Journal of Epidemiology39 citations Open access
Semantic Scholar
Designing an optimal HIV programme for South Africa: Does the optimal package change when diminishing returns are considered?
Calvin Chiu, L. Johnson, L. Jamieson, B. Larson +1 more
2017BMC Public Health37 citations Open access
Semantic Scholar
The relationship between intimate partner violence and HIV: A model-based evaluation
Simon W. Rigby, L. Johnson
2017Infectious Disease Modelling35 citations Open access
Semantic Scholar
Adherence challenges with daily oral pre‐exposure prophylaxis during pregnancy and the postpartum period in South African women: a cohort study
D. J. Joseph Davey, D. Nyemba, J. Castillo-Mancilla, L. Wiesner +8 more
2022Journal of the International AIDS Society34 citations Open access
Semantic Scholar
Potential Impact and Cost-Effectiveness of Condomless-Sex–Concentrated PrEP in KwaZulu-Natal Accounting for Drug Resistance
A. Phillips, V. Cambiano, L. Johnson, F. Nakagawa +15 more
2019Journal of Infectious Diseases33 citations Open access
Semantic Scholar
Age in antiretroviral therapy programmes in South Africa: a multi-centre observational cohort study
M. Cornell, L. Johnson, M. Schomaker, F. Tanser +8 more
2015The Lancet HIV33 citations Open access
Semantic Scholar
The impact of HIV and tuberculosis interventions on South African adult tuberculosis trends, 1990-2019: a mathematical modeling analysis
M. Kubjane, M. Osman, A. Boulle, L. Johnson
2022International Journal of Infectious Diseases32 citations Open access
Semantic Scholar
Tracing of patients lost to follow-up and HIV transmission: Mathematical modelling study based on two large ART programmes in Malawi
J. Estill, H. Tweya, M. Egger, G. Wandeler +6 more
2014Journal of Acquired Immune Deficiency Syndromes31 citations Open access
Semantic Scholar
All-cause mortality in HIV-positive adults starting combination antiretroviral therapy: correcting for loss to follow-up
N. Anderegg, L. Johnson, E. Zaniewski, K. Althoff +6 more
2017AIDS (London)30 citations Open access
Semantic Scholar
The impact of self-selection based on HIV risk on the cost-effectiveness of pre-exposure prophylaxis in South Africa.
L. Jamieson, G. Gomez, K. Rebe, B. Brown +6 more
2020AIDS (London)27 citations Open access
Semantic Scholar
Estimating the effect of HIV on cervical cancer elimination in South Africa: Comparative modelling of the impact of vaccination and screening
M. Boily, R. Barnabas, M. Rönn, Cara J. Bayer +12 more
2022EClinicalMedicine25 citations Open access
Semantic Scholar
World AIDS Day 2020: Reflections on global and South African progress and continuing challenges
Y. Pillay, L. Johnson
2021Southern African Journal of HIV Medicine25 citations Open access
Semantic Scholar
Risk factors for oral human papillomavirus in heterosexual couples in an African setting.
Zizipho Z. A. Mbulawa, L. Johnson, Dianne J. Marais, D. Coetzee +1 more
2014Journal of Infection25 citations
Semantic Scholar
Precarious transition: a mortality study of South African ex-miners
Kim Bloch, L. Johnson, M. Nkosi, R. Ehrlich
2018BMC Public Health24 citations Open access
Semantic Scholar

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M. Mahy — researcher profile on SciRah

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J. Eaton — researcher profile on SciRah

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