Scientists claim to have found another distinct genetic form of Alzheimer’s

Study suggests almost everyone with two copies of genetic variant ApoE4 goes on to develop disease

Having two copies of a gene variant known to predispose people to Alzheimer's could in fact represent a distinct genetic form of the disease, researchers have said.

The variant, known as ApoE4, has long been known to increase the risk of developing Alzheimer's, with two copies conferring greater risk than one.