We may be predisposed to some of the most deadly conditions from birth. A leading GP has identified 10 deadly diseases and conditions we're genetically more prone to. And the problem, according to Dr Dawn Harper, is that so few people are aware of their medical history. Indeed, fresh research shows half (49 percent) of UK adults have no idea what their blood type is, whilst 55 percent don't know their family's medical history of serious illnesses such as heart disease, cancer or diabetes.