Question

History
Vaccination
In the 18th century, a horrible disease called smallpox was very
common and many people died from it. If people survived, they were
left with awful scars on their body. People also suffered from a milder
disease called cowpox which they caught from cows. Edward Jenner
was an English doctor who noticed that people who had had cowpox
rarely suffered from smallpox. Jenner was convinced that
the cowpox infection had protected these people in some way.
In 1796, Jenner did an experiment on a young boy called James
Phipps. He introduced the cowpox infection into a cut on the boy's
arm. Phipps became ill with cowpox for a while and then recovered.
Later, Jenner infected Phipps with smallpox and waited. Phipps
never caught smallpox because the cowpox had protected him. This
was the first example of vaccination.
Jenner's discovery has made an enormous difference to the health of
the world. Nowadays, people are vaccinated against many illnesses.
After a worldwide vaccination programme by the World Health
Organization, smallpox was finally eradicated in 1980.



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Answer 1

Explicație:

cu placere,cred ca este destul de bun !