I am 71, and I have a strong family history, on my Father's side of Alzheimer's. Beginning with his father, then his sister, his brother and finally himself. His sister's son, my first cousin, (he was some older than me), was affected too and died two months ago.
And so I grew to know this disease as a child and young girl. I remember how it upset dad to visit his sister, who had progressed. It devasted him and he would cry and cry. Then, even though he was the oldest, his younger brother came down with it next and suddenly too.