Training Activities There are numerous training activities available through G-TRAIN. These activities are organized into the following categories: Biological Hazards Chemical Hazards Nuclear and/or Radiological Hazards Explosives / Mass Trauma Agroterrorism and Veterinary/Zoonotic Preparedness Epidemiology and Surveillance Infections / Syndromes Mental Health / Psychosocial Issues Information Technology / Communications Coordination Across Agencies State and/or Local Public Health System Operations Terrorism or Disaster Preparedness and Response Models of Excellence Other Public Health Topics