"Flour doesn't have a bad rep for being a particularly "risky" food, but there's actually a chance to get sick from flour. Since it is made from wheat, it has the potential to contain deadly bacteria called E. coli. While food-borne illnesses don't happen often because of flour, as it's usually used in foods that are cooked and bacteria dies in heat, it is best not to indulge in raw cookie dough due to the dangerous bacteria."