Estimates of global, regional, and national incidence, prevalence, and mortality of HIV, 1980–2015: the Global Burden of Disease Study 2015

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Abstract

BACKGROUND: Timely assessment of the burden of HIV/AIDS is essential for policy setting and programme evaluation. In this report from the Global Burden of Disease Study 2015 (GBD 2015), we provide national estimates of levels and trends of HIV/AIDS incidence, prevalence, coverage of antiretroviral therapy (ART), and mortality for 195 countries and territories from 1980 to 2015. METHODS: For countries without high-quality vital registration data, we estimated prevalence and incidence with data from antenatal care clinics and population-based seroprevalence surveys, and with assumptions by age and sex on initial CD4 distribution at infection, CD4 progression rates (probability of progression from higher to lower CD4 cell-count category), on and off antiretroviral therapy (ART) mortality, and mortality from all other causes. Our estimation strategy links the GBD 2015 assessment of all-cause mortality and estimation of incidence and prevalence so that for each draw from the uncertainty distribution all assumptions used in each step are internally consistent. We estimated incidence, prevalence, and death with GBD versions of the Estimation and Projection Package (EPP) and Spectrum software originally developed by the Joint United Nations Programme on HIV/AIDS (UNAIDS). We used an open-source version of EPP and recoded Spectrum for speed, and used updated assumptions from systematic reviews of the literature and GBD demographic data. For countries with high-quality vital registration data, we developed the cohort incidence bias adjustment model to estimate HIV incidence and prevalence largely from the number of deaths caused by HIV recorded in cause-of-death statistics. We corrected these statistics for garbage coding and HIV misclassification. FINDINGS: Global HIV incidence reached its peak in 1997, at 3·3 million new infections (95% uncertainty interval [UI] 3·1-3·4 million). Annual incidence has stayed relatively constant at about 2·6 million per year (range 2·5-2·8 million) since 2005, after a period of fast decline between 1997 and 2005. The number of people living with HIV/AIDS has been steadily increasing and reached 38·8 million (95% UI 37·6-40·4 million) in 2015. At the same time, HIV/AIDS mortality has been declining at a steady pace, from a peak of 1·8 million deaths (95% UI 1·7-1·9 million) in 2005, to 1·2 million deaths (1·1-1·3 million) in 2015. We recorded substantial heterogeneity in the levels and trends of HIV/AIDS across countries. Although many countries have experienced decreases in HIV/AIDS mortality and in annual new infections, other countries have had slowdowns or increases in rates of change in annual new infections. INTERPRETATION: Scale-up of ART and prevention of mother-to-child transmission has been one of the great successes of global health in the past two decades. However, in the past decade, progress in reducing new infections has been slow, development assistance for health devoted to HIV has stagnated, and resources for health in low-income countries have grown slowly. Achievement of the new ambitious goals for HIV enshrined in Sustainable Development Goal 3 and the 90-90-90 UNAIDS targets will be challenging, and will need continued efforts from governments and international agencies in the next 15 years to end AIDS by 2030. FUNDING: Bill & Melinda Gates Foundation, and National Institute of Mental Health and National Institute on Aging, National Institutes of Health.

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The record

Venue

The Lancet HIV

Topic

HIV/AIDS Research and Interventions

Field

Medicine

Canadian institutions

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Funders

National Institute of Mental HealthNational Institute on AgingCenter for Innovative MedicineSistema Nacional de InvestigadoresNIHR Oxford Biomedical Research CentreCollege of Medicine, Korea UniversityInstituto de Salud Carlos IIIWarwick Medical SchoolOxford Martin School, University of OxfordSchool of Medicine, Wayne State UniversityMedical Research CouncilSamfundet FolkhälsanU.S. Food and Drug AdministrationNational Institutes of HealthWellcomeInnovative Medicines InitiativeNational Institute for Health and Care ResearchThe Wellcome Trust DBT India AllianceUniversität ZürichVetenskapsrådetNorwegian Institute of Public HealthKnut och Alice Wallenbergs StiftelseHealth Science Center, University of TennesseeFonds de Recherche du Québec - SantéUniversitetet i TromsøGeneralitat ValencianaKorea UniversityEuropean Regional Development FundKing's College LondonAcademy of FinlandFonds National de la Recherche LuxembourgAlzheimer's Research and Prevention FoundationSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungInstitute for Health Metrics and EvaluationNanjing UniversityAcademy of Medical SciencesAXA Research FundInternational Society of NephrologyWorld Health OrganizationWellcome TrustNational Research University Higher School of EconomicsUniversity of WarwickNational Center for Child Health and DevelopmentNational Science FoundationDepartment of Biotechnology, Ministry of Science and Technology, IndiaNorthwestern UniversityBill and Melinda Gates FoundationFundação para a Ciência e a TecnologiaQatar National Research FundAlzheimerfondenUnited Nations Population FundKarolinska InstitutetJackson State UniversityFundação de Amparo à Pesquisa do Estado de São PauloEuropean CommissionUniversidad de Ciencias Aplicadas y AmbientalesWayne State University

Keywords

MedicineIncidence (geometry)Burden of diseaseHuman immunodeficiency virus (HIV)Environmental healthDisease burdenDiseaseDemographyVirologyPopulationInternal medicine

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