The conflict that escalated in March 2015 in Yemen has left more than 22 million people - 75 per cent of the population - in need of humanitarian aid, the greatest number in any country in the world.
More than 60 per cent of the population (17.8 million people) are without enough to eat. Over 8.4 million of these people are one step away from famine. About 16 million Yemenis do not have access to safe water sources, with rural areas most affected.