The day of a successful vaccination – level 2
Smallpox was a very dangerous disease which killed millions of people. Cowpox was a less dangerous disease.
Edward Jenner was a doctor. He observed that milkmaids who caught cowpox, seemed to be immune to smallpox.
On May 14, 1796, Jenner took material from cowpox on the hand of a milkmaid and injected it into the arm of an 8-year-old boy.
After that the boy had a fever, but he did not get seriously ill. He also became immune to smallpox.
The success of Jenner’s vaccine led to the use of vaccination as a means of preventing smallpox.
The term “vaccine” comes from the Latin word for cow, “vacca,” because Jenner used cowpox to create the smallpox vaccine.
Difficult words: smallpox (a dangerous disease which can kill people), cowpox (a disease of cows and sometimes people), milkmaid (a woman who gets milk from cows), immune (resistant to a disease).
What other diseases have been successfully prevented with vaccines?
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