The duration required to thaw a pre-cooked, sliced ham depends primarily on its weight and the method employed. In general, refrigeration is the safest and most recommended method. Leaving the ham at room temperature can lead to bacterial growth, compromising safety and quality.
Proper thawing preserves the texture and flavor of the ham, preventing undesirable alterations that can occur with rapid thawing methods. The slower refrigeration process ensures a more even thaw, reducing the risk of outer layers warming to unsafe temperatures while the center remains frozen. Historical food safety practices have consistently emphasized the importance of slow thawing to inhibit microbial proliferation.