 Health officials say there's no need to worry, but there are some unanswered questions following an outbreak of listeria linked to various deli meats. At least two people have died. Here's Jackie Quinn. This listeria outbreak is baffling health officials who know most of those sickened by the bacteria had eaten deli meat that was sliced at the grocery store deli counter. But there are no links yet on which store, which state, and what brand