You should have some inclination to medicine in order to fully understand the white paper, but if you can grasp what the project is trying to achieve such as being a collection of medical records that can determine cure to common illness.
Its normal with most of the projects, you need some existing knowledge to completely understand them since they can be quite specific and i think eHealth is still quite easy to understand compared to some other ones.
The main idea of the project is easy to understand, but I think they should try to make marketing (wp, videos, ..) easier to reach as many people as possible.
They definitely need some really good videos which explains the whole concept. I guess for quite some people seeing the sheer volume of the white paper is discouraging and they don't bother to pay attention to the the project.