About 870 million people are still undernourished around the world, specially in developing countries. Undernourishment is defined as the lack of sufficient caloric intake.
The situation is specially serious in Africa. In countries like Sudan, South Sudan, Eritrea, etc. more than 35% of the population is undernourished. Other countries where a high percentage of the population is undernourished include North Korea, Laos, Paraguay, Haiti, to name a few.
Source: Food and Agriculture Organization of the United Nations: The FAO Hunger Map 2012