KVPY 2020-21 SA Exam Previous Papers

Question : 53 of 80

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The concept of vaccination arose from Edward Jenner's observation that

Injecting inactivated anthrax spores in sheep protected them from anthrax
Injecting humans with tuberculosis-infected lung extracts protected them from tuberculosis
Milk-maids previously infected with cowpox did not contract small pox
Injecting inactivated rabies virus in humans protected them from rabies

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