This is a very broad question with no simple answer as causes of many diseases are multi-factorial. As this question is posted on the GMOAnswers.com website, we assume you are asking about a causal relationship between disease and GM crops.
Available evidence indicates that GM crops are no different from non-GM crops of the same species with regard to safety for the traits currently approved and on the market. More specific information on the potential impact of GMO crops on human health is provided in responses to other questions on this website:
- Will I get cancer?
- I know there haven't been definitive studies that conclude that GMOs can do harm to one's body, but have there been studies done that show GMOs do NOT harm our health?
- I have seen repeatedly on this website that GMOs are safe, healthy and nutritious but I don't see any links to these studies. Could you please provide the links?
An active lifestyle and a healthy, well-balanced diet are key components in decreasing your risk of developing cancer, diabetes and other diseases. More information on the diseases in your question can be found at www.cancer.gov, www.diabetes.org, www.autism-society.org and http://www.nlm.nih.gov/medlineplus/autoimmunediseases.html.