As long it does not stink
I would eat it within a week after the sell by date.
The sell by date is just for the store. The actual expiration date can vary depending on the type of deli meat it is. If you aren't going to consume it within a week I would freeze the portion not used.
Let your nose be your guide. Most brands say "up to" two weeks.
Depends slightly on the type of meat but a week in a good fridge should be safe for all.
I don't know.
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