Give a short note on discovery of vaccine!
Answers
Vaccine (L. Vacca = Cow or Vaccinia = Cowpox) was actually developed by the British physician by Edward Jenner in 1796.
While treating a smallpox patient, he found that the milkmaids who had developed cowpox did not catch smallpox even during epidemics. He thought if some material from cowpox sores is injected into some healthy persons, they should also not develop smallpox. To his surprise, what he thought was right as persons inoculated with material trom cowpox sores became immune to smallpox.
Thus, the concept of vaccines and vaccination was discovered by Edward Jenner.
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Answer
On May 14, 1796, Jenner took fluid from a cowpox blister and scratched it into the skin of James Phipps, an eight-year-old boy. A single blister rose up on the spot, but James soon recovered. On July 1, Jenner inoculated the boy again, this time with smallpox matter, and no disease developed. The vaccine was a success.