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Grading of the skin reactions.
| Reactions | Descriptions | Score |
|---|---|---|
| Erythema and eschar formation (E) | No erythema | 0 |
| Very slight erythema (barely perceptible) | 1 | |
| Well-defined erythema | 2 | |
| Moderate to severe erythema | 3 | |
| Severe erythema (beef-redness) to eschar formation | 4 | |
| Edema formation (O) | No edema | 0 |
| Very slight edema (barely perceptible) | 1 | |
| Slight edema | 2 | |
| Moderate edema (raised more than 1 mm) | 3 | |
| Severe edema (raised more than 1 mm and extending beyond exposure area) | 4 |
