COW UDDER VACCINATE. “When smallpox was present in Jesty’s locality in 1774, he was determined to protect the life of his family. Jesty used material from udders of cattle that he knew had cowpox and transferred the material with a small lancet to the arms of his wife and two boys. The trio of vaccinees remained free of smallpox, although they were exposed on numerous occasions in later life.”
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