The E. coli outbreak cases linked to McDonald's have widened to include 75 people in 13 states.The CDC said it expects the real number to be higher, and that it can take weeks to identify a case.Slivered onions from a McDonald's supplier are under investigation, leading to recalls at other brands. Sign up to get the inside scoop on today’s biggest stories in markets, tech, and business — delivered daily. Read preview Thanks for signing up! Go to newsletter preferences Thanks for signing up! Access ...