I met Sebenele, a bright 14 year-old boy with a big smile, this week during a visit to Swaziland to see how my fund is helping UNICEF to support and protect children living with HIV. Swaziland has the highest rate of HIV infection in the world. Twenty-four per cent of children here have lost one or both parents to AIDS and many are themselves now living with HIV. I thought about my own children and how in many ways the things Sebenele enjoys are the same things they do. Yet he told me how he is struggling to continue to take his antiretroviral medicine, which is vital to ensure he stays healthy, because he can't keep the pills down without any food.