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How many people had Alzheimer's in 2019? A breakdown of global and U.S. prevalence

According to estimates from the Global Burden of Disease (GBD) study, approximately 57.4 million people worldwide were living with dementia in 2019. With Alzheimer's disease being the most common cause of dementia, accounting for 60-80% of cases, this figure provides a broad context for understanding **how many people had Alzheimer's in 2019**. The vast majority of those affected were aged 65 or older.