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Jenner prepared the vaccine of smallpox by using _______

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Jenner prepared the vaccine of smallpox by using _______

(a) The attenuated pathogen of smallpox

(b) The killed pathogen of smallpox

(c) The attenuated pathogen of Cowpox

(d) Pathogens from Cowpox pustule

The question was posed to me during an online exam.

My enquiry is from Human Health and Disease topic in division Human Health and Disease of Biology – Class 12

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Right choice is (d) Pathogens from Cowpox pustule

The best explanation: Edward Jenner prepared his first vaccine of smallpox by using pathogens from cow pustule. He injected fluid from the sore of milkmaid suffering from cowpox into the body of a healthy boy which did not later catch smallpox.

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