Could injecting yourself with blood of the young reverse the aging process?

Could injecting yourself with blood of the young reverse the aging process?: "It would appear that the Slovak-Hungarian "Blood Countess" Elizabeth Báthory may have been on to something: Researchers have shown that it is possible to reverse cognitive decline in old mice by injecting them with blood from the young. Elderly mice who were given transfusions of young blood were shown to exhibit improved learning skills and memory — and at a level comparable to much younger mice. Should the same effect apply to humans, it could represent a novel way to treat neurodegenerative disorders like Alzheimer's and Parkinson's."