Table 1.

Dynamic risk conditions that may be present in the field and should be considered within the risk assessment

Human actions	Natural phenomena	Accidents
Altered environment and technology (improvement or destruction such as: deforestation, air pollution) Behavior (deliberate negative actions such as war, crimes, genetic engineering) Detection (surveillance, awareness, diagnostic tools) Prevention (vaccines, prophylactic medication, sanitation) Vector control Medical treatment (safety, efficacy, availability, timeliness) Health system infrastructure Education, training, awareness	Atmospheric (cyclones, hurricanes, tornadoes, tropical and lightning storms) Heat waves, cold fronts Terrain stability Seismic (fault ruptures, ground shaking, lateral spreading, tsunamis, and seiches) Other geologic and hydrologic debris (avalanches, rock falls, extensive soils, landslides and submarine slides, subsidence [sinking]) Hydrologic (flooding, salinization, drought, desertification, erosion, sedimentation) Volcanic tephra, ash, cinders, lapilli and pyroclastic flows, flows (lava flows, mudflows), projectiles, lateral blasts, gasses Wildfire (brush, forest, grass, savannah) Natural selection (emerging infections, zoonotic, animal and plant diseases) Others related to local/regional organisms/microorganisms such as insect bites (i.e., mosquitoes, ticks, flies, ants), spiders, poisonous snakes, poisonous plants	Hydrocarbons and oil spills Nuclear and radioactivity facility accidents Laboratory accidents Field accidents (falls, trauma, heat, hypothermia) Travel accidents (vehicle breakdown, crash) Others (dual use research of concern)