In 2018, stunting affected an estimated 21.9% or 149 million children under the age of 5 years, while wasting affected 7.3% or 49 million children under the age of 5 years. Around 45% of deaths among children under the age of 5 years are linked to undernutrition. These mostly occur in low- and middle-income countries. At the same time, in these same countries, rates of childhood overweight and obesity are rising. Every country in the world is affected by one or more forms of malnutrition. Combating malnutrition in all its forms is one of the greatest global health challenges.

WHO works with Member States and partners towards the goal of ending all forms of malnutrition by 2030 as part of the Sustainable Development Goals. Meeting this goal is contingent on securing universal access to effective nutrition interventions and to healthy diets from sustainable and resilient food systems.

In recent years, there has been increasing acknowledgement of the important role mental health plays in achieving global development goals, as illustrated by the inclusion of mental health in the Sustainable Development Goals. Depression is one of the leading causes of disability. Suicide is the second leading cause of death among 15-29-year-olds. People with severe mental health conditions die prematurely – as much as two decades early – due to preventable physical conditions.

Experience demonstrates that real progress is possible in countries at all income levels. Each country’s pathway will differ depending on the local context, however the above lessons are essential for equitable and effective progress.

In a world built on the ability to see, vision, the most dominant of our senses, is vital at every turn of our lives. The newborn depends on vision to recognize and bond with its mother; the toddler, to master balance and learn to walk; the schoolboy, to walk to school, read and learn; the young woman to participate in the workforce; and the older woman, to maintain her independence.

The treatment of eye conditions targets curing as well as addressing symptoms and progression. Treatment of chronic eye conditions also aims to prevent or delay the onset of irreversible vision impairment.

The unavailability of timely, safe blood transfusions has led to many otherwise avoidable deaths. A consistent supply of blood is a cornerstone of any health-care system, but this relies on regular donations and effective health-care infrastructure.

Large, global epidemiologic datasets such as WHO Neurology Atlas have made strides in bringing the true burden of neurological disorders into public awareness. As part of the 11th revision of the International classification of diseases (ICD), the Disorders of the Nervous System chapter saw major changes in organization and content in line with advances in neurological science and contemporary clinical practice.