This would mean that “1 in 85 persons worldwide will be living with the disease. It is estimated that about 43% of prevalent cases need a high level of care, equivalent to that of a nursing home. If interventions could delay both disease onset and progression by a modest 1% per year, there would be nearly 9.2 million fewer cases of the disease in 2050, with nearly the entire decline attributable to decreases in persons needing a high level of care.” (Corrada, Brookmeyer, et.al. “Dementia incidence continues to increase with age in the oldest old: The 90+ study”, Annals of Neurology;Volume 67, Issue 1, pages 114–121, January 2010 and Brookmeyer, E. Johnson, K. Ziegler-Graham, H. Arrighi. “Forecasting the Global Burden of Alzheimer’s disease, Alzheimer’s and Dementia, Volume 3, Issue 3, Pages 186-191R, 2013.