Indeed, the risk of Alzheimer’s doubles if a parent or sibling has it, probably due in large part to the presence of the ApoE gene. The risk triples for Europeans who inherit a particular type of ApoE, called ε4; inheriting two copies of ε4 increases the risk roughly tenfold.
事实上，如果双亲或兄弟姐妹中有人罹患阿尔茨海默症，你的患病风险也将翻番，这很有可能是因为ApoE基因所赐。遗传了某种ApoE基因（ε4）的欧洲人得阿尔茨海默症的概率会增加两倍；遗传双份ε4基因会让概率增加大约十倍。