The Genetic Factor in Developing Alzheimer's

In the documentary, Hemsworth has told that he's eight to ten times more likely to develop Alzheimer's due to this genetic factor. There are some diseases where if you inherit the genetic change, you will get sick. And then actually for most of the common conditions, most diseases like heart disease and diabetes and many of the common cancers. Genetics is a big part of the risk, but it's not one change or two changes. It's millions of positions, which each contribute a tiny bit to that risk.