Over 2.1 million children below 15 years are living with HIV globally, most of them infected before their birth, during delivery or while being breastfed. While around 4.2 lakh children were newly infected in 2007, an estimated 2.9 lakh children under 15 years died from AIDS the same year. Young people, aged 15-24, accounted for about 40% of new HIV infections in 2007.