Question
Question: Which one of the following cannot be used for preparation of vaccines against plague?...
Which one of the following cannot be used for preparation of vaccines against plague?
A
Formalin-inactivated suspensions of virulent bacteria
B
Avirulent live bacteria
C
Synthetic capsular polysaccharide material
D
Heat-killed suspensions of virulent bacteria
Answer
Synthetic capsular polysaccharide material