Which of the following does NOT need to be washed?

Sliced cheese typically does not require washing prior to use. This is because cheese is a dairy product that has undergone pasteurization and is usually packaged in a way that protects it from contamination. Washing sliced cheese may alter its texture and flavor without significantly enhancing food safety.

In contrast, raw vegetables need to be washed to remove surface dirt, bacteria, and any pesticide residues that may be present. Cooked poultry also does not require washing since cooking it to the appropriate temperature effectively eliminates harmful pathogens. Fruits with skins, like apples or oranges, should be washed before consumption to remove contaminants, as harmful bacteria may reside on the surface, and handling them can transfer these bacteria to the flesh when cut.