The Rise of Scientific/Medical Vampirism?

It looks like vampirism may be good for older people. Yes, there is a rare disease that probably created the vampire archetype, but it seems that science has found another reason: It really does rejuvenate older people. It's something that will lead to more in-depth research, or it will spawn some creepy billionaire practices.

http://futurism.com/young-blood-transfusions-improve-mental-and-physical-performance-in-old-mice/