The technique of preparing vaccine from attenuated pathogen was discovered by

Edward Jenner (1796)

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Robert Koch (1876)

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Louis Pasteur (1879)

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Von Behring (1891)

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Solution

The correct option is C Louis Pasteur (1879)
An attenuated vaccine is a vaccine created by reducing the virulence of a pathogen, but still keeping it viable (live). Attenuation takes an infectious agent and alters it so that it becomes harmless or less virulent. The technique of preparing vaccine from attenuated pathogen was first discovered by Louis Pasteur in 1879 against anthrax and rabies.
So, the correct answer is 'Louis Pasteur (1879)'.

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