"... You don't need a genetic test to know that excercise is incredibly healthy. ..." But if you charge "X" dollars to screen people for say Alzheimer's, somet

"... You don't need a genetic test to know that excercise is incredibly healthy. ..." But if you charge "X" dollars to screen people for say Alzheimer's, something they may get 20 years before symptoms arise? The current population is say 25M worldwide expected to rise to 81M by 2040 ~ http://www.abc.net.au/catalyst/stories/2364899.htm http://www.abc.net.au/catalyst/stories/2364899.htm Though there are tests currently being trialled to test for beta amyloids in blood.