Attention-deficit/hyperactivity disorder (ADHD) affects 3%–5% of children and about 2.5% of adults, though prevalence varies across regions.1 The psychostimulant methylphenidate is widely used as first-line treatment in many health systems.2

The WHO updates…

Nature Health - A qualitative analysis of two decades of policy documents from 200 countries and interviews with 46 key informants found that adoption of policies to promote physical activity has...