On the occasion of the 20th anniversary of the first observance of World AIDS Day, a new report by UNAIDS calls on countries to realign HIV prevention programmes through understanding how the most recent HIV infections were transmitted, and understanding the reasons why they occurred. “Not only will this approach help prevent the next 1,000 infections in each community, but it will also make money for AIDS work more effectively and help put forward a long term and sustainable AIDS response,” said UNAIDS Executive Director Dr Peter Piot.