Vienna, Austria has been chosen to host the XVIII International AIDS Conference (AIDS 2010), the largest international meeting on HIV, where every two years 25,000 participants representing all stakeholders in the global response to HIV meet to assess progress and identify future priorities. AIDS 2010 is organized by the International AIDS Society (IAS), in partnership with government, scientific and civil society partners in Austria and international partners from civil society and the United Nations. Based in Geneva, Switzerland, the IAS is the world’s leading independent association of HIV professionals. Registration for this event starts at 1st December 2009.