With climate change and health crises rightfully receiving international attention, the time has come to focus on hunger as a top priority. WHO regards hunger and malnutrition as the gravest threat to public health, and climate change threatens to further destabilise already fragile food-production systems.

Every 10 seconds we lose a child to hunger. This is more than HIV/AIDS, malaria and tuberculosis combined.

One cup of food a day changes Fabian's life completely. But this morning, about a billion people on Earth - or one out of every seven - woke up and didn't even know how to fill this cup. One out of every seven people.

If a child in its first thousand days - from conception to two years old - does not have adequate nutrition, the damage is irreversible.

With climate change and health crises rightfully receiving international attention, the time has come to focus on hunger as a top priority. WHO regards hunger and malnutrition as the gravest threat to public health, and climate change threatens to further destabilise already fragile food-production systems.

If any good comes out of the current famine in the Horn of Africa - amidst the pictures of mothers carrying dying babies at their shrivelled breasts and hollow-eyed children with swollen bellies and matchstick limbs - it will be galvanising the world on the need to ensure access to nutritious food for the world's most vulnerable people.

Food is one issue that cannot be solved person by person. We have to stand together.