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| Grading | Definition |
|---|---|
| Grade 0 | None |
| Grade 1 | Mild: Transient or mild limitation in activity (<48 hours); no medical intervention/therapy required |
| Grade 2 | Moderate: Mild to moderate limitation in activity - some assistance may be needed; no or minimal
medical intervention/therapy required |
| Grade 3 | Severe: Marked limitation in activity, some assistance usually required; medical intervention/
therapy required, hospitalisation possible |
