There are two sources of disease other than diseases like malaria and even that can be considered a weakened immune system created by the two sources.
Those two sources are toxicity and acidosis. The monitor of this toxicity and acidosis is the diet and the bodies ability to take in nutrition while at the same time removing toxins. Sounds so simple doesn't it, but a doctor would make the process so complicated you would feel it was above your head just to understand it. The colon and the blood as well as the liver are vital for this process to happen and when we fill our bodies with acidic foods, junk foods, processed foods, foods with no enzymes, and alcohol topping it all off with coffee, prescription drugs, over the counter drugs we send the body into a tailspin and most on this board are in that tailspin and haven't got a clue about why as they insist they are doing good by spouting off hogwash as they wander about in the dark, trying this and trying that and say things like its the parasites. Get real and open your eyes.