The document provides an overview of Alzheimer's disease including what it is, who can get it, signs and symptoms, and how it should be treated. Alzheimer's is an irreversible brain disease that is the fourth leading cause of death among older adults. It destroys memory, thinking skills, and the ability to function. While there is currently no cure, symptoms can be temporarily treated with medication. The disease is expected to increase significantly in the coming years as the population ages.