The number of people with dementia has doubled in just 26 years

Eiichi Okubo (top), 71, speaks to his wife Yumiko, 68, who has been suffering from dementia, near her care house in Tokyo, Japan, October 29, 2018. Picture taken October 29, 2018.   REUTERS/Toru Hanai - RC176C446830

Dementia is set to be one of the great health challenges of the next century, as the world's elderly population balloons. Image: REUTERS/Toru Hanai

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 Global age-standardised prevalence of Alzheimer's disease and other dementias by sex, 2016
Global age-standardised prevalence of Alzheimer's disease and other dementias by sex, 2016 Image: Lancet Neurology
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