Which one of the following cannot be used for preparation of...

Which one of the following cannot be used for preparation of vaccines against plague?

Options

AFormalin-inactivated suspensions of virulent bacteria
BAvirulent live bacteria
CSynthetic capsular polysaccharide material
DHeat-killed suspensions of virulent bacteria

Correct answer

C. Synthetic capsular polysaccharide material

Step-by-step solution

Synthetic capsular polysaccharide vaccines are available for the treatment of pneumonia and meningitis. Vaccines against plague are prepared from the suspensions of attenuated or heat killed virulent bacteria or avirulent live bacteria.

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