More than 3 million children or young adults worldwide are living with juvenile idiopathic arthritis (JIA), juvenile systemic lupus erythematosus (JSLE) or club foot, according to an analysis of the World Bank Group databank that included data from >200 countries. Of the 2 billion individuals aged <16 years who were included in the analysis, ~2,069,246 had JIA and ~206,931 had JSLE in 2017. Furthermore, an estimated 675,061 children aged <5 years had club foot. Asia had the highest prevalence of all three conditions, followed by Africa, the Americas, Europe and Oceania.