It is estimated 57m people live with dementia, an incurable degenerative condition that, in its worst phases, leaves them dependent on 24-hour care. A new study published in Lancet Public Health adds weight to predictions that that number is going to explode. Its projection, that the number will treble to 152.8m by 2050, with women disproportionately affected by the condition, is in line with forecasts made for the past seven years or more. But unlike earlier studies, which relied on global projections, this one took into account country-level estimates and specific risk factors. What really needs to be done about Dementia ?