Existing vaccines work against viruses and bacteria, but the parasite that causes malaria is a more complex type of organism.

ECONOMIST: Malaria research gets a shot in the arm

"It is pure science fiction to say we can change the rate of aging in an organism as complex as ours, " argues Thomas Perls, a geriatrician at Boston University Medical Center who studies centenarians.

FORBES: Researchers are unlocking the mysteries of aging.