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.
According to the Alzheimer's Association, Alzheimerâs disease most commonly affects older adults, but it can also affect people in their 30s or 40s. When Alzheimerâs disease occurs in someone under the age of 65, it is known as early-onset Alzheimerâs disease. About 5% of people with Alzheimerâs disease have the early-onset form, the Alzheimer's Association says. The mean age of the early-onset group was 56 +/- 5 years and 74 +/- 6 years for the late-onset group. Many of them are in their 40s and 50s when Alzheimerâs disease takes hold. Types of early-onset Alzheimerâs disease: