Basically it’s a disease that slowly makes your brain function less and less. At the start that’s complex things like memory and problem solving. The dangers start to come when you forget or don’t realize things that are a danger to you. There’s the obvious like leaving the stove on but it’s also not uncommon for people with Alzheimer’s to be extremely dehydrated because they basically forgot to drink water and didn’t realize they were thirsty. The main deadly aspect is mainly these symptoms
As it gets worse and you lose less of your brain you start losing essential stuff like managing your body temp. It’s generally more complex things like that but think of it as your body forgets to tell your heart to beat.
*this is a huge simplification meant for a 5 year old lol*
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