This E. coli outbreak is caused by the strain O121, which causes cramps, bloody diarrhea, vomiting and can potentially lead to a life-threatening situation. The Centers for Disease Control noted that most people who became ill with this particular strain recall baking something homemade prior to becoming ill.
Several in this group noted that they have used the General Mills brand of flour. It was also noted that many of those who presented symptoms of E. coli had also eaten raw dough or batter while making their homemade treats, which General Mills specifically advises against.
http://www.infowars.com/general-mills-recalls-10-million-pounds-of-flour-over-e-coli-outbreak/