Dr. Eric Daar reports from the 3rd International AIDS Society Conference on HIV Pathogenesis and Treatment in Rio de Janeiro Brazil. July 25, 2005 highlights include: Diversity of HIV strains from around the world - recombination, co-infection, and superinfection. Growing epidemics of HIV, particularly in Eastern Europe. Presentation by Dr. Blick on "Patient zero: The Connecticut source of the multi-drug resistant dual-topic, rapidly progressing HIV-1 strain found in New York City." Increasing transmission of drug resistant virus.