Scenario 3   (Instructions) 1) Which of the following statements most accurately describes expected psychosocial responses to mass casualty radiological events? Widespread panic is expected due to fear of radiation. Severe, recurrent vomiting may manifest as a response to stress and mimic radiation-induced prodromal symptoms. Post-Traumatic Stress Disorder (PTSD) will immediately manifest in up to 30% of patients. Bystanders typically initiate rescue and response efforts. The most seriously injured casualties, triaged as immediate, arrive first at the hospital.