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Interpretation of IgG antidiphtheria toxin values observed in 100 pre-vaccination and 91 post-vaccination sera, as proposed by the EIA manufacturer.
| Concentration mIU/ml | Vaccination Recommendation | Before vaccination | After vaccination |
| < 100 | Basic immunisation immediately | 34 | 6 |
| [100 – 1000[ | Booster vaccination immediately | 60 | 17 |
| [1000 – 1400[ | Booster vaccination after 5 years | 3 | 6 |
| [1400 – 2000[ | Booster vaccination after 7 years | 1 | 5 |
| ≥ 2000 | Booster vaccination after 10 years | 2 | 57 |
