'In Melbourne for World AIDS Day, a big day across the world.'

From Sydney Opera House to the London Eye,  from Cape Town€™s Table Mountain to Niagara Falls scores of cities around the world have marked World AIDS Day by turning Red.

And at the show in Melbourne tonight, Bono paid special tribute.

'It's very special to be here in Melbourne for World AIDS Day - its a big day for us and big day across the world.
'I want to thank all the fans in the red zones who are paying for medications for people who need them. We have 5 million people on life saving drugs but there's still 10 million people who are still denied access to anti retrovirals....'

Find out more about World AIDS Day, (RED) and the goal that by 2015  virtually no child in the world is born with HIV.