Pennsylvania continues to have the highest number of E. coli cases linked to tainted romaine lettuce in the country.
The U.S. Centers for Disease Control said Wednesday the outbreak has grown and sickened 84 people from 19 states.
There are 18 confirmed cases in Pennsylvania, more than any other state.
The CDC and the U.S. Food and Drug Administration last week issued a warning against eating all romaine lettuce.
