How long can sliced proscuitto be out of the refrigerator?

Proscuitto is a dry-cured meat that can be stored at room temperature for a short period of time. Sliced prosciutto can be left out of the refrigerator for up to 2 hours. However, it is best to store sliced prosciutto in the refrigerator to maintain its quality and freshness. Prosciutto that has been left out of the refrigerator for more than 2 hours should be discarded.