| Date | 1880 |
| Author | Koch |
| Contribution | b. Discovered delayed hypersensitivity (cell-mediated immunity) in tuberculosis. |
| Reference | Bellanti |
| Notes | Lechevalier and Solotorovsky refer to Koch's paper of 1890 on tuberculin. |
| Category | Immunology |
| Pathogen Class | Bacteria |
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