| Date | 1800 |
| Author | Jenner |
| Contribution | Published claim that cowpox vaccination had been validated and had the potential to eradicate smallpox from the world. |
| Reference | Anon. |
| Notes | The claim probably appears in one of the pamphlets published (according to Garrison) by Jenner in 1799-1806. McNeil, like Garrison, emphasizes the rapid spread of vaccination. While Jenner's precepts were sound, and were applied with enormous success, they were developed in the absence of a scientifically established germ theory. Jenner had announced his great discovery two years earlier (in his booklet of 1798) but this Timeline offers only minimal information on immunological or microscopical developments prior to 1800, because of their lack of direct connection with germ theory. |
| Category | Immunology |
| Pathogen Class | Viruses |
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