This edition of UNAIDS data highlights these challenges and successes. It contains the very latest data on the world’s response to HIV, consolidating a small part of the huge volume of data collected, analysed and refined by UNAIDS over the years. The full data set of information for 1990 to 2017 is available on aidsinfo.unaids.org. Foreword -- State of the epidemic -- Global and regional data -- Eastern and southern Africa -- Western and central africa -- Asia and the Pacific -- Latin America -- Caribbean -- Middle East and North Africa -- Eastern Europe and central Asia -- Western and central Europe and North America -- Annex on methods.