What must not happen for cooked foods intended for patients in isolation?

The correct answer highlights the importance of preventing the re-serving of any cooked foods for patients in isolation. This practice is crucial for maintaining food safety and hygiene standards within healthcare settings. Re-serving cooked foods poses significant risks, particularly the potential for cross-contamination and the introduction of pathogens that can compromise the health of vulnerable patients, such as those in isolation.

In isolation units, patient safety is paramount, and any previously served food should not be reused. This helps prevent the spread of infections, which is particularly vital for patients with weakened immune systems or those recovering from illness. Thus, strict adherence to this guideline is essential to protect patient health and promote a safe dining environment.

While the other options may have relevance in certain contexts—such as the segregation of packaged foods to avoid contamination or considerations for serving vegetarian options—they do not address the critical safety concerns relating to the handling of cooked foods intended for patients in isolation as effectively as the prohibition on re-serving does.