Last year, Aids became a leading infectious disease on the mainland, killing almost 7,000 people in the first eight months. Another 700,000 people are affected by the disease, and worryingly, experts believe more than half don't even know they are HIV positive. Designers against Aids are promoting Aids awareness with a collection that will go on sale at H&M from May 28, with 25 per cent of the proceeds going to youth HIV/Aids awareness projects. Katy Perry, Dita von Teese and Estelle are among A-list musicians who are promoting the faded, 80s-style organic range of T-shirts, T-shirt dresses and vests. Each product line in the range has a message about Aids prevention. N.E.R.D. uses a clever graphic reading 'Use Your Brain' on coloured vests and T-shirts, while Katy Perry's safe sex message is 'what's on the outside is what counts' on T-shirts. Another T-shirt designed by Yoko Ono simply states, 'Imagine Peace'. 'H&M and Fashion against Aids are so important to us because we could never reach so many young people on our own,' said Ninette Murk, founder of Designers against Aids. 'People build their attitude towards their sex lives when they're very young, so it's important for them to realise that safe sex is a vital part of that.'