Mark has a wheat allergy. When he uses the tongs used for muffins for hard-boiled eggs, what is this an example of?

Question

Quizplus · Accepted Answer

Using the same tongs for muffins and hard-boiled eggs is an example of cross-contact.
For this reason, having designated utensils for different items in the self-service area is important. Items in the self-service area can also be labeled with informational signs identifying wheat and eggs as allergens.

Mark Has a Wheat Allergy