A British team of scientists from Imperial College, London said that awareness, education, and changed sexual behavior caused huge declines in AIDS infections in East Zimbabwe. They said that 49% fewer women in 15 to 24 year band and 23% fewer men in 17 to 29 year band were noticed to have the virus. According to UN data, 40 millions world over are infected with the AIDS virus and over 5 million died in 2005. The poorest region in the world, sub-Saharan Africa is the worst affected area. AIDS infection in India is not well recorded to get reliable estimates.