A historian challenges a labor-history fable. Timothy Messer-Kruse doesnât remember her name, but the question she asked in his college classroom a dozen years ago changed his career â and now it may revolutionize everything historians thought they knew about a hallowed event in the imagination of the American Left.
Though the effects of the disease are similar, there are two main types. 1  Early-onset Alzheimer's. This type happens to people who are younger than age 65. 2  Late-onset Alzheimer's. This is the most common form of the disease, which happens to people age 65 and older.
Types of Dementia. Alzheimer's Disease (AD) is the most common type of dementia, with over 10% of Americans aged 65 and older suffering from the affliction. This percentage rises to over 33% in Americans aged 85 or older, indicating the increasing risk of developing dementia associated with aging.