NEW : More romaine lettuce has been recalled amid an investigation into an outbreak of food-borne illness that has sickened at least 19 people in three states . Romaine lettuce is expanded to Vaughan Foods in Oklahoma . May : Vaughan says it has 100 customers who want the lettuce . NEW : A student sues Freshway Foods , which was involved in earlier recall .
NEW : Romaine lettuce is expanded to Vaughan Foods in Oklahoma . May : Vaughan says it has 100 customers who want the lettuce . NEW : A student sues Freshway Foods , which was involved in earlier recall .