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.
Which one of the following cannot be used for preparation of vaccines against plague?
Held on 30 Apr 2010 · Verified 9 Jul 2026.
Formalin-inactivated suspensions of virulent bacteria
Avirulent live bacteria
Synthetic capsular polysaccharide material
Heat-killed suspensions of virulent bacteria
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