At first, the symptoms are not obvious. Early on you can still speak and hold simple conversations. Most people don’t even notice anything is wrong. Then you’re sitting at a red light, and suddenly you can’t remember where you are or even how to make the car move forward. 

That’s how Alzheimer’s disease works. It’s an irreversible, progressive brain disorder that destroys your memory and thinking skills and, eventually, the ability to carry out the simplest tasks.