Reply #19: The research says there is no difference in death rates between those tested and those not tested

[daleo]

Presumably this applies to the entire age range, including 50 year olds. There is a risk of death from treatments themselves (infections, surgical mistakes, etc) - apparently the risk of death from treatment is about the same as the reduction in deaths from treatments triggered by a positive test. There is no way to know ahead of time whether any treatment will be positive or negative.

I doubt if Prius's matter, but as time goes we will see if a correlation becomes evident. Since the Prius produces less air pollution that other cars, widespread use of it probably would actually reduce cancer risk.