Neff Walker

Summary

Affiliation: Joint United Nations Programme on HIV/AIDS
Country: Switzerland

Publications

  1. ncbi request reprint Epidemiological analysis of the quality of HIV sero-surveillance in the world: how well do we track the epidemic?
    N Walker
    United Nations Joint Programme on HIV AIDS, Geneva, Switzerland
    AIDS 15:1545-54. 2001
  2. ncbi request reprint Meeting international goals in child survival and HIV/AIDS
    Neff Walker
    Joint United Nations Programme on HIV AIDS, 20 Avenue Appia, 1211 Geneva, Switzerland
    Lancet 360:284-9. 2002
  3. ncbi request reprint Growing in silence: selected regions and countries with expanding HIV/AIDS epidemics
    Peter D Ghys
    UNAIDS, Geneva, Switzerland
    AIDS 17:S45-50. 2003
  4. ncbi request reprint Methods and procedures for estimating HIV/AIDS and its impact: the UNAIDS/WHO estimates for the end of 2001
    Neff Walker
    Joint United Nations Programme on HIV and AIDS UNAIDS, Geneva, Switzerland
    AIDS 17:2215-25. 2003
  5. ncbi request reprint Estimates of HIV-1 prevalence from national population-based surveys as a new gold standard
    J Ties Boerma
    Department of HIV AIDS, WHO, 1211, Geneva, Switzerland
    Lancet 362:1929-31. 2003
  6. ncbi request reprint Status of the HIV/AIDS epidemic and methods to monitor it in the Latin America and Caribbean region
    Jesus M Garcia Calleja
    UNAIDS, Geneva, Switzerland
    AIDS 16:S3-12. 2002
  7. pmc Monitoring the scale-up of antiretroviral therapy programmes: methods to estimate coverage
    J Ties Boerma
    The World Health Organization, Geneva, Switzerland
    Bull World Health Organ 84:145-50. 2006
  8. ncbi request reprint Estimation of "needs" and "probable uptake" for HIV/AIDS preventive vaccines based on possible policies and likely acceptance (a WHO/UNAIDS/IAVI study)
    Jose Esparza
    WHO UNAIDS HIV Vaccine Initiative, Health Technology and Pharmaceuticals, World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland
    Vaccine 21:2032-41. 2003
  9. pmc The workbook approach to making estimates and projecting future scenarios of HIV/AIDS in countries with low level and concentrated epidemics
    N Walker
    Joint United Nations Program on HIV AIDS, 20 Avenue Appia, CH 1211 Geneva 27, Geneva, Switzerland
    Sex Transm Infect 80:i10-13. 2004
  10. ncbi request reprint HIV surveillance: a global perspective
    Elizabeth Pisani
    The Joint United Nations Program on HIV AIDS, Geneva, Switzerland
    J Acquir Immune Defic Syndr 32:S3-11. 2003

Detail Information

Publications37

  1. ncbi request reprint Epidemiological analysis of the quality of HIV sero-surveillance in the world: how well do we track the epidemic?
    N Walker
    United Nations Joint Programme on HIV AIDS, Geneva, Switzerland
    AIDS 15:1545-54. 2001
    ..The objective of this paper was to analyse the quality of HIV/AIDS sentinel surveillance systems in countries and the resulting quality of the data used to make estimates of HIV/AIDS prevalence and mortality...
  2. ncbi request reprint Meeting international goals in child survival and HIV/AIDS
    Neff Walker
    Joint United Nations Programme on HIV AIDS, 20 Avenue Appia, 1211 Geneva, Switzerland
    Lancet 360:284-9. 2002
    ..We investigated this assumption by estimating HIV-attributable under-5 mortality in 39 countries in sub-Saharan Africa and comparing it to total mortality in children younger than 5 years between 1990 and 1999...
  3. ncbi request reprint Growing in silence: selected regions and countries with expanding HIV/AIDS epidemics
    Peter D Ghys
    UNAIDS, Geneva, Switzerland
    AIDS 17:S45-50. 2003
  4. ncbi request reprint Methods and procedures for estimating HIV/AIDS and its impact: the UNAIDS/WHO estimates for the end of 2001
    Neff Walker
    Joint United Nations Programme on HIV and AIDS UNAIDS, Geneva, Switzerland
    AIDS 17:2215-25. 2003
    ..The importance of having comparable country-specific estimates of HIV/AIDS is growing as estimates are used to determine how international resources to fight HIV/AIDS will be allocated to countries...
  5. ncbi request reprint Estimates of HIV-1 prevalence from national population-based surveys as a new gold standard
    J Ties Boerma
    Department of HIV AIDS, WHO, 1211, Geneva, Switzerland
    Lancet 362:1929-31. 2003
  6. ncbi request reprint Status of the HIV/AIDS epidemic and methods to monitor it in the Latin America and Caribbean region
    Jesus M Garcia Calleja
    UNAIDS, Geneva, Switzerland
    AIDS 16:S3-12. 2002
    ..There is a need to improve data collection and introduce new tools to monitor behavior trends and the impact of interventions...
  7. pmc Monitoring the scale-up of antiretroviral therapy programmes: methods to estimate coverage
    J Ties Boerma
    The World Health Organization, Geneva, Switzerland
    Bull World Health Organ 84:145-50. 2006
    ..The mid-2005 estimate of 970,000 people receiving ART in low- and middle-income countries (with an uncertainty range 840,000-1,100,000) corresponds to a coverage of 15% of people in need of treatment...
  8. ncbi request reprint Estimation of "needs" and "probable uptake" for HIV/AIDS preventive vaccines based on possible policies and likely acceptance (a WHO/UNAIDS/IAVI study)
    Jose Esparza
    WHO UNAIDS HIV Vaccine Initiative, Health Technology and Pharmaceuticals, World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland
    Vaccine 21:2032-41. 2003
    ..The potential advantages and disadvantages of targeted versus universal vaccination will have to be considered...
  9. pmc The workbook approach to making estimates and projecting future scenarios of HIV/AIDS in countries with low level and concentrated epidemics
    N Walker
    Joint United Nations Program on HIV AIDS, 20 Avenue Appia, CH 1211 Geneva 27, Geneva, Switzerland
    Sex Transm Infect 80:i10-13. 2004
    ..The paper also discusses the strengths and weakness to this approach to making estimates and projections of HIV/AIDS in countries with low level and concentrated epidemics...
  10. ncbi request reprint HIV surveillance: a global perspective
    Elizabeth Pisani
    The Joint United Nations Program on HIV AIDS, Geneva, Switzerland
    J Acquir Immune Defic Syndr 32:S3-11. 2003
    ..In most countries, however, insufficient use is made of the information generated by these systems in terms of strengthening HIV prevention and care programs...
  11. pmc The UNAIDS Estimation and Projection Package: a software package to estimate and project national HIV epidemics
    P D Ghys
    Joint United Nations Program on HIV AIDS, 20 Avenue Appia, CH 1211 Geneva 27, Geneva, Switzerland
    Sex Transm Infect 80:i5-9. 2004
    ..It also provides an example of using the EPP in a country with a generalised epidemic. The paper discusses the strengths and weaknesses of the software and its envisaged future developments...
  12. pmc Improved data, methods and tools for the 2007 HIV and AIDS estimates and projections
    P D Ghys
    UNAIDS, 20, Avenue Appia, CH 1211 Geneva 27, Switzerland
    Sex Transm Infect 84:i1-4. 2008
  13. pmc A global analysis of trends in the quality of HIV sero-surveillance
    J M Garcia-Calleja
    World Health Organization, Geneva, Switzerland
    Sex Transm Infect 80:i25-30. 2004
    ..To examine the quality of HIV sero-surveillance systems in countries by 2002, as well as trends between 1995 and 2002...
  14. pmc Improving analysis of the size and dynamics of AIDS epidemics
    P D Ghys
    Joint United Nations Programme on HIV AIDS, Geneva, Switzerland
    Sex Transm Infect 82:iii1-2. 2006
  15. ncbi request reprint AIDS in a new millennium
    B Schwartlander
    UNAIDS, 20 Avenue Appia, Geneva 27 CH 1211, Switzerland
    Science 289:64-6. 2000
    ..In their Perspective, Schwartländer and his colleagues discuss the newly released statistics and the strategies needed to combat the further spread of HIV/AIDS and to reduce prevalence in the most severely affected countries...
  16. ncbi request reprint The global impact of HIV/AIDS
    P Piot
    Joint United Nations Programme on HIV/AIDS (UNAIDS, 20 Avenue Appia, 1211 Geneva 27, Switzerland
    Nature 410:968-73. 2001
    ..Nothing less than a sustained social mobilization is necessary to combat one of the most serious crises facing human development...
  17. ncbi request reprint Neonatal survival: a call for action
    Jose Martines
    Department of Child and Adolescent Health and Development, WHO, Geneva, Switzerland
    Lancet 365:1189-97. 2005
    ..International donors and leaders of developing countries should be held accountable for meeting their commitments and increasing resources...
  18. ncbi request reprint Better health statistics are possible
    Abdallah Bchir
    Global Alliance for Vaccine and Immunization, Geneva, Switzerland
    Lancet 367:190-3. 2006
  19. ncbi request reprint Estimated global distribution and regional spread of HIV-1 genetic subtypes in the year 2000
    Saladin Osmanov
    Joint HIV Vaccine Initiative of the World Health Organization WHO and the Joint United Nations Program on HIV AIDS UNAIDS, Geneva, Switzerland
    J Acquir Immune Defic Syndr 29:184-90. 2002
    ....
  20. ncbi request reprint The global impact of scaling up HIV/AIDS prevention programs in low- and middle-income countries
    John Stover
    Futures Group Constella, Glastonbury, CT 06033, USA
    Science 311:1474-6. 2006
    ..Thus, greater spending on prevention now would not only prevent more than half the new infections that would occur from 2005 to 2015 but would actually produce a net financial saving as future costs for treatment and care are averted...
  21. pmc Back to basics in HIV prevention: focus on exposure
    Elizabeth Pisani
    Family Health International, Bangkok, Thailand
    BMJ 326:1384-7. 2003
  22. ncbi request reprint The use of blood donor data for HIV surveillance purposes
    Endang Sedyaningsih-Mamahit
    National Institute of Health Research and Development, Ministry of Health, Jakarta, Indonesia
    AIDS 18:1849-51. 2004
    ..In most of the 19 countries with similar estimates, blood donations came primarily from replacement donors. Our analysis suggests that blood donors are usually not a good proxy for the general population...
  23. ncbi request reprint Can we reverse the HIV/AIDS pandemic with an expanded response?
    John Stover
    Futures Group International, Glastonbury, CT, USA
    Lancet 360:73-7. 2002
    ..Analyses suggest that if the successes achieved in some countries in prevention of transmission can be expanded to a global scale by 2005, about 29 million new infections could be prevented by 2010...
  24. ncbi request reprint Comparison of household-survey estimates with projections of mortality and orphan numbers in sub-Saharan Africa in the era of HIV/AIDS
    Nicholas C Grassly
    Department of Infectious Disease Epidemiology, Imperial College, London
    Popul Stud (Camb) 58:207-17. 2004
    ..Reducing adult mortality from causes other than AIDS brings the model estimates into close agreement with the surveys. This suggests that the fraction of orphans attributable to AIDS is greater than estimated previously...
  25. ncbi request reprint Estimating the global burden of HIV/AIDS: what do we really know about the HIV pandemic?
    Neff Walker
    UNICEF, New York, New York 10017, USA
    Lancet 363:2180-5. 2004
    ..We explain the reason for moving to the use of plausibility bounds, the factors that determine the width of the bounds, and the implications for policy makers and programme managers...
  26. ncbi request reprint Estimating HIV/AIDS prevalence in countries with low-level and concentrated epidemics: the example of Honduras
    Jeremías Soto Ramón
    PASCA The Futures Group International and National Autonomous University of Honduras, School of Medical Sciences Scientific Research Unit, Tegucigalpa, Honduras
    AIDS 16:S18-22. 2002
    ..Estimations of the burden of HIV is a continuous process and should be updated on a regular basis according to the most recent and relevant information available...
  27. ncbi request reprint AIDS in Africa
    Peter D Ghys
    Lancet 360:1425; author reply 1425. 2002
  28. ncbi request reprint Evidence-based, cost-effective interventions: how many newborn babies can we save?
    Gary L Darmstadt
    Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
    Lancet 365:977-88. 2005
    ..Simultaneous expansion of clinical care for babies and mothers is essential to achieve the reduction in neonatal deaths needed to meet the Millennium Development Goal for child survival...
  29. doi request reprint Saving newborn lives in Asia and Africa: cost and impact of phased scale-up of interventions within the continuum of care
    Gary L Darmstadt
    Department of International Health, E8153, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
    Health Policy Plan 23:101-17. 2008
    ....
  30. ncbi request reprint Estimates of maternal mortality worldwide between 1990 and 2005: an assessment of available data
    Kenneth Hill
    Harvard Center for Population and Development Studies, Cambridge, MA 02138, USA
    Lancet 370:1311-9. 2007
    ..In 2006, a new maternal mortality working group was established to develop improved estimation methods and make new estimates of maternal mortality for 2005, and to analyse trends in maternal mortality since 1990...
  31. ncbi request reprint Global burden of disease 2005: call for collaborators
    Christopher J L Murray
    Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA 98104, USA
    Lancet 370:109-10. 2007
  32. ncbi request reprint Interpreting health statistics for policymaking: the story behind the headlines
    Neff Walker
    Division of Policy and Planning, UNICEF, New York 10017, USA
    Lancet 369:956-63. 2007
    ..A common framework and standardised methods, building on the work of Child Health Epidemiology Reference Group (CHERG) and others, are urgently needed...
  33. ncbi request reprint Resource needs to support orphans and vulnerable children in sub-Saharan Africa
    John Stover
    Futures Institute, 41A New London Turnpike, Glastonbury, CT 06033, USA
    Health Policy Plan 22:21-7. 2007
    ..This is at least four times current funding and should be a priority topic for donor and national government resource allocation decisions this year...
  34. ncbi request reprint Testing the accuracy of demographic estimates in countries with generalized epidemics
    John Stover
    Futures Group, Glastonbury, CT 06033, USA
    AIDS 18:S67-73. 2004
    ..To assess the accuracy of demographic estimates that include the effects of HIV/AIDS on adult mortality...
  35. pmc Integrating HIV prevention and treatment: from slogans to impact
    Joshua A Salomon
    Harvard Center for Population and Development Studies, Department of Population and International Health, Harvard School of Public Health, Boston, Massachusetts, USA
    PLoS Med 2:e16. 2005
    ..In this paper, we quantify the opportunities and potential risks of large-scale treatment roll-out...
  36. ncbi request reprint The growing burden of tuberculosis: global trends and interactions with the HIV epidemic
    Elizabeth L Corbett
    Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, England, UK
    Arch Intern Med 163:1009-21. 2003
    ..The increasing global burden of tuberculosis (TB) is linked to human immunodeficiency virus (HIV) infection...
  37. ncbi request reprint Estimating resource needs for HIV/AIDS health care services in low-income and middle-income countries
    Stefano Bertozzi
    Division of Health Economics and Policy, The National Institute of Public Health INSP, Universidad 655, Cuernavaca, Mexico
    Health Policy 69:189-200. 2004
    ..This paper details the methods and assumptions used to estimate HIV/AIDS health care financial needs and it discusses the limitations and data needs for this model...