If we look at this in the context of Aubrey de Grey's model of aging, it mostly targets damage type number 5, cell loss.
I guess the media and general public will need a lot more practice before they can break down "immortality treatments" into pieces that look like the actual research.
On the other hand, wikipedia says cell loss causes Parkinson's, so I hereby predict that within 5 years we'll have covens of Parkinson's patients roaming the streets at night, shakily sucking the blood of the innocent.
Cell loss? Blood cells are replaced daily. This has more to do with the proteins and such that are carried in blood (according to the authors of the paper).
In experiments performed on mice, blood transfusions from young mice reversed age-related markers in older mice. The protein involved is identical in humans.
http://mic.com/articles/88851/harvard-scientists-may-have-just-unlocked-the-secret-to-staying-young-forever