| Date | 1891 |
| Author | Lister |
| Contribution | Arranged a symposium on bacterial immunity. |
| Reference | Foster |
| Notes | Joseph Lister arranged the symposium as part of the Congress of Hygiene in London. The occasion is significant historically because it helps to pinpoint the time at which experts acknowledged that the cellular and the new humoral mechanisms of immunity could both be important in defense against microbial disease. |
| Category | Immunology |
| Pathogen Class | Bacteria |
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