The reduction of polio by 99 per cent since 1988 has relied on the work of over 20 million volunteers – true polio heroes who show incredible bravery to reach children in war zones, flood- or earthquake-hit areas, lawless regions and displaced in refugee camps.

On 19 August, World Humanitarian Day recognizes those who face danger and adversity to help others. This year, the day aims to reach one billion people with the message of ‘People Helping People’. One person already on board is Beyoncé, whose song ‘I was here’ will create the beat for the day.

World Humanitarian Day needs your help to make this a truly global message that can’t be ignored. Be part of the billion who will tell the world ‘I was here’ by signing up here with your Facebook or Twitter account.