A global view of HIV infection

Global number of new HIV infections

Treatment Cascade

Modelling software used for estimates

Approaches and tools for 2016 country-specific HIV and AIDS estimates

PLHIV 2017
New HIV Infections
Treatment Cascade
Modelling Software
AIDS Supplement 2017


What we do

Work together to develop the methods used to generate global HIV and AIDS statistics


Who we are

An international group of epidemiologists, demographers, statisticians and public health experts that work together with UNAIDS and a Secretariat at Imperial College London and the University of Cape Town

Latest information

  • Meeting

    Modelling Paediatric HIV and the need for ART: September 2018

    Bern, Switzerland WHO, UNAIDS  and the UNAIDS Reference Group on Estimates, Modelling and Projections held a consultation to review and discuss estimates of child infections and need for ART, which took place in Bern on 20th September 2018. The overall meeting aim was to: Improve the ability for...
  • Meeting

    Technical updates and method development for the UNAIDS Estimates: Sept 2018

    Bern, Switzerland The purpose of this meeting was to provide technical recommendations for updates to Spectrum and accompanying estimation tools. Specific objectives included reviewing new methods for estimating the first ‘90’ of the UNAIDS ’90-90-90’ goals, planned implementation of the HIVE model...
  • Meeting

    Improving and validating estimates of AIDS deaths

    Bern, Switzerland The UNAIDS Reference Group held its thematic meeting on "Improving and validating estimates of AIDS deaths" at the Institute for Social and Preventive Medicine, University of Bern, in Bern Switzerland, 17-18 September 2018 and was divided into the following sessions:  Reconciling...
  • Meeting

    Model Testing Workshop

    Mombasa, Kenya The Reference Group convened a workshop with national teams from Kenya, Malawi, Uganda, and Zimbabwe to discuss and review existing prevalence and incidence models, and recent updates to Spectrum. The meeting also offered an opportunity for national teams to raise any country-...
  • Website

    Remembering Professor Basia Zaba

    The UNAIDS Reference Group wishes to celebrate the tremendous contributions of Professor Basia Zaba, who passed away on 12 July.

    Professor Zaba made a huge contribution to the work of the UNAIDS Reference Group since its inception through leadership of the ALPHA Network and other collaborations, and Basia taught us to approach our work with passion, vigour, and tenacity. While Basia is no longer with us, Basia's legacy will continue to influence our work and how we approach our work.

    Our thoughts remain with Basia's family and friends.