Well Tim, I imagine you know where I am on this...
Exo 15:26 And said, If thou wilt diligently hearken to the voice of the LORD thy God, and wilt do that which is right in his sight, and wilt give ear to his commandments, and keep all his statutes, I will put none of these diseases upon thee, which I have brought upon the Egyptians: for I am the LORD that healeth thee.
Deu 7:11 Thou shalt therefore keep the commandments, and the statutes, and the judgments, which I command thee this day, to do them.
Deu 7:15 And the LORD will take away from thee all sickness, and will put none of the evil diseases of Egypt, which thou knowest, upon thee; but will lay them upon all them that hate thee.
Psa 103:3 Who forgiveth all thine iniquities; who healeth all thy diseases;
Jas 5:14 Is any sick among you? let him call for the elders of the church; and let them pray over him, anointing him with oil in the name of the Lord:
That's right. And if we follow his commands, part of them tell us how to eat right instead of listening to medical, health, or even Michele Obamama's advice. In short, we are sick because we turn away from biblical advice and follow something else.
I'm rarely sick (even though my mainline Christian counterparts tell me I will be if I don't do this, that or the other thing--- they get sick, so the logic is they think that I must, too). And I rarely go to the doctor. If I go, it's more to confirm diagnosis instead of receiving continuous treatment as many do--- if I know what I have, I can deal with it. They even invent conditions such as high cholesterol, high blood pressure, high this or that to convince us we "need" these medicines the rest of our lives. No we don't. So that kind of stuff I don't listen to. I don't even know what my cholesterol is and I don't care.
When I am sick, I get introspective and see where I went wrong.
Here is a very good treatment on James 5:14...
http://stlouis.cogwa.org/media/entry/anointing-for-healing
Same fellow who did the treatment on the law.