Which of the following is not considered part of a primary assessment?

The primary assessment is a critical first step in the evaluation of a patient during an emergency situation. It focuses on quickly identifying life-threatening conditions. This assessment typically includes checking the patient’s level of consciousness, airway, breathing, circulation, and neurological status. Vital signs are essential indicators of the patient’s overall physiological state and help in determining if there's an immediate threat to life.

While obtaining a patient history can contribute to understanding their overall health and might take place during the assessment process, it is not a primary focus in the primary assessment phase, which is more about immediate stabilization. Allergy history, while important for future treatment considerations, is not part of the immediate evaluation of life-threatening issues; thus, it does not fit into the primary assessment parameters.

Therefore, allergy history is the correct answer, as it is not considered part of the crucial initial evaluation aimed at ensuring the patient's immediate safety and stability.