There is a nationwide outbreak of listeria linked to sliced deli meats that is part of an ongoing investigation, according to the Centers for Disease Control. The outbreak killed two people, including one from New Jersey, and hospitalized 28 others. Here’s what you need to know about the listeria outbreak that is causing so much harm. Where is the listeria outbreak? The listeria outbreak has been reported in 12 states, according to the CDC. These states include New Jersey, New York, Pennsylvania, Maryland, Massachusetts, Virginia, North Carolina, Georgia, Missouri, Illinois, Wisconsin and Minn…