Disease can be seen as the antechamber of death.
Are there reliable tests for predicting disease? The short answer is: not for Alzheimer’s or other common diseases. Tests do exist for some specific diseases, most with known familial predispositions, such as Huntington’s disease, cystic fibrosis, Duchenne’s dystrophy and many more.
The basis for most of the severe mental disorders is clear
The basis for most of the severe mental disorders is in your genes and the early development of the brain. But we will not be able to find THE cause of these disorders. Why not?