| Date | 1844 |
| Author | Danielssen |
| Contribution | Inoculated himself and others to show non-infectious nature of leprosy. |
| Reference | Norman |
| Notes | In the period 1844-58, he inoculated himself (four times) and various patients and hospital staff personnel with material from leprous nodules. Failure to induce leprosy was taken as supportive of the non-contagiousness of the disease. See 1847. |
| Category | Causation |
| Pathogen Class | General |
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