Monsanto's head of the FDA's food safety division is threatening to get rid of raw (real) milk, and the real reason for this may have reared its ugly head.
While Gates is looking to genetically engineer milk and perhaps gut bacteria itself, a significant study has just shown that normal bacteria-rich yogurt which supports the person's own gut bacteria (their immune system) equals or even outdoes AIDS drugs. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3056109/
Gates' work would genetically engineer the milk that goes into the yogurt (as well as into cheeses, ice cream, cottage cheese, cream, butter, cream cheese, etc) which might genetically engineer the bacteria that is in the gut (thus genetically engineering the person's immune system, which is primarily comprised of gut bacteria).