Staging of Acute Radiation Syndromes (5)
| Phase | Description |
| Prodromal (“running before”) | Signs and symptoms include nausea, vomiting, and diarrhea; hair loss above 3 Gy (300 rad); skin erythema above 6 Gy (600 rad) |
| Latent | Period of no signs or symptoms |
| Manifest | Nausea, vomiting, and diarrhea return; hematologic syndrome; gastrointestinal syndrome; central nervous system syndrome; signs and symptoms return to prodromal levels or worse |
| Recovery | If good treatment is provided and the affected individual received less than a 10-Gy (1,000-rad) dose, recovery is possible after the manifest phase |