After getting through most of my first trimester eating cold cuts for lunch almost daily, I learned I'm wasn't supposed to eat deli meats during pregnancy...unless they are heated up.
So that next time I ordered my turkey and cheddar on whole wheat, I instead asked for grilled turkey and cheddar so the heat would kill off any listeriosis.
WebMD says that all lunch meats should be avoided and this includes "ham, turkey, bologna, and salami -- unless they have been reheated until steaming hot."
Listeria is a bacteria that can cause food-borne illness, which can lead to miscarriage, stillbirth, or other serious health problems.
Are you concerned with eating cold cuts during pregnancy?
(This is general mom advice and experience, but definitely check with your own health professional with any questions while pregnant.)