Shifting the focus to functioning: essential for achieving Sustainable Development Goal 3 inclusive Universal Health Coverage and supporting COVID-19 survivors

Alongside mortality and morbidity, functioning is a third health indicator which must be assessed and integrated into global health population-based metrics. This paper defines functioning, presents measurement options and highlights the importance of functioning when considering the need for, and outcome of, rehabilitation and assistive technology following a health condition illustrated by the example of COVID-19. Increased attention is needed to ensure improved clarity, consistency and understanding of the definition and measurement of functioning.