| Date | 1894 |
| Author | Pfeiffer |
| Contribution | Eucidated action of complement and antibody in cell lysis. |
| Reference | Bellanti |
| Notes | Complementary work on complement was done by Jules Bordet (see 1895). The term complement was introduced by Ehrlich. |
| Category | Immunology |
| Pathogen Class | Bacteria |
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