Which is an example of cross-contact?

Putting cheese on a sandwich can be an example of cross-contact. If the cheese or its packaging has come into contact with allergens, such as nuts or gluten, and is then placed on a sandwich without proper cleaning or precautions, it can result in cross-contact. This can be a concern for individuals with food allergies or sensitivities to those allergens.
Cross-contact occurs when allergens from one food or surface unintentionally come into contact with another food, potentially causing an allergic reaction in individuals with food allergies. It is important to maintain proper separation, cleaning, and hygiene practices when handling and preparing food to prevent cross-contact and ensure the safety of individuals with food allergies.