Unicef Bulgaria ambassador Dimitar Berbatov listens to a question at a United for Unicef press conference in Hangzhou aimed at highlighting the important role of education in preventing HIV among young people in ChinaPhotograph: Sharron Lovell/UNICEFBerbatov, right, and Manchester United team-mate Michael Carrick take part in 'the sticker game', which demonstrates the effects of stigma felt by young people living with HIVPhotograph: Sharron Lovell/UNICEFBerbatov takes part in a lively activity aimed at helping children to develop the skills needed to prevent transmission of HIV, reduce stigma and end discrimination against people affected by HIV and AIDSPhotograph: Sharron Lovell/UNICEFCarrick joins in the activity with Chinese schoolchildrenPhotograph: Sharron Lovell/UNICEFCarrick signs the shirt of a student participating in the event aimed at highlighting the important role of education in preventing HIV among young peoplePhotograph: Sharron Lovell/UNICEFRyan Giggs, and Patrice Evra, right, are met by a group of vulnerable children in Kuala Lumpur, including MH, who is wearing a Manchester United shirtPhotograph: UNICEFGiggs is all smiles as he joins in a lively conversation with United fan MHPhotograph: UNICEF