Before revision: Specific conditions and symptoms may have values or descriptive comment for each level, but the general guideline is: 1 - Mild 2 - Moderate 3 - Severe 4 - Life-threatening 5 - Death See Reference for full details on the current criteria.
After revision: Specific conditions and symptoms may have values or descriptive comment for each level, but the general guideline is: 1 - Mild 2 - Moderate 3 - Severe 4 - Life-threatening 5 - Death