Nightly News | July 30, 2013
>>> we have an update on an outbreak of a stomach illness across the country. federal health officials say at least 372 confirmed cases have been reported since mid june. in 15 dates now, 21 people have reportedly been hospitalized. iowa's had the most cases, 145 of them. officials say the outbreaks there and in nebraska have been traced to prepackaged salad mix. cdc and the fda say they're looking at other possible causes of this contamination.