Richard, you have posted a great deal of material, and there seems to be the seeds of a variety of good projects here, although it is not clear to me yet what you will focus on in your thesis. In one of articles you cite, we read:
"Oral rehydration solution (ORS) can reverse most cases of dehydration if given quickly. It can be made from one teaspoon of salt and eight teaspoons of sugar dissolved in a liter of water then administered gradually — at a cost of literally pennies per child." (Gerlin, Andrea. A Simple Solution. Times Magazine, Sunday, Oct, 08, 2006)
This is a very interesting idea, and one that could be the basis of a great product. If its true that saving the lives of children is this easy, perhaps you can build create a kit that could be distributed to poor communities, and that would help people to understand how to administer the ORS, even if they cannot read. Here is information that deals with communicating public health practices to impoverished communities.
Once you have decided on your product idea, I will have more to say to you about how your bibliography helps to frame your thesis arguments.