There are over 2 million malnourished children under 5 in northeast Nigeria. Over 8 million people are food insecure.
The full scale of the emergency is still unknown, as many areas are still under the control of Islamist militant group Boko Haram.
We followed the aid workers of Action Against Hunger (ACF) in the South West of Maiduguri, the capital of Borno State. Here volunteers go door to door to assess the situation and find severely malnourished children who need urgent assistance.
The NGO has mobile clinics rotating in the most vulnerable areas of the city. The Nutrition Programme Officer of ACF, Bolus Sani Shabanda, explains that in each location they identify between 30 and 60 cases per week.
Action Against Hunger is also among the few NGOs who are working in newly-liberated areas, like the town of Monguno, located further north, where people were found in desperate famine-like conditions.