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    What did Jenner observe about milk-maids and smallpox?


    Can anyone help me
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    Try this: Information on Jenner
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    (Original post by Kish)
    What did Jenner observe about milk-maids and smallpox?


    Can anyone help me

    That milkmaids who were infected with cowpox did not become infected with the much more deadly smallpox.

    This suggested to jenner that infection by cowpox provided immunity against smallpox. He then injected a young boy with cowpox (a not very serious infection). When the boy recovered to full health, he injected the same boy with smallpox and luckily for him and the boy, he survived!
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    Jenner inserted pus taken from a cowpox pustule on the hand of milkmaid Sarah Nelmes and inserted it into an incision on the boy's arm. He was testing his theory, drawn from the folklore of the countryside, that milkmaids who suffered the mild disease of cowpox never contracted smallpox.

    Jenner subsequently proved that having been inoculated with cowpox Phipps was now immune to smallpox.
    Undaunted, Jenner experimented on several other children, including his own 11-month-old son. In 1798 the results were finally published and Jenner coined the word vaccine from the Latin vacca for cow, and called the process vaccination.

    The immediate reaction to Jenner's work was ridicule. Critics, especially the clergy, claimed it was repulsive and ungodly to inoculate someone with material from a diseased animal. A satirical cartoon of 1802 showed people who had been vaccinated sprouting cow's heads. However the obvious advantages of vaccination and the protection it provided won out, and vaccination soon became widespread.


    Well, I hope that helped ya!
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    Vacca means cow in Latin, that's where 'vaccine' comes from. The rest is correct also. Jenner's was a chance discovery, like many others in medicine and other histories.
 
 
 

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