Wellcome Collection
A cow's udder with vaccinia pustules and human arms exhibiting both smallpox and cowpox pustules. Coloured engraving by J. Pass, 1811.
1811
Lettering: Inoculation. 1. A cow's udder affected with vaccina. 2,3,4. Vaccine vesicles on the human arm. J. Pass sc. 5. A papulous eruption which sometimes occurs during vaccination. 6. Smallpox & the cowpox on the same arm.
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