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.
1 But Alzheimer's is not just a disease of old age. 2  Up to 5 percent of people with the disease have early onset Alzheimer's (also known as younger-onset), which often appears when someone is in their 40s or 50s. 3  Learn more: Early Onset Alzheimer's and Risk Factors.4  Alzheimer's worsens over time.lzheimer's and dementia basics. 1  Alzheimer's is the most common form of dementia, a general term for memory loss and other intellectual abilities serious enough to interfere with daily life. 2  Alzheimer's disease accounts for 60 to 80 percent of dementia cases.