How would you expect an injection of killed or attenuated Salmonella typhi,the causative agent of typhoid fever,to protect an individual?

Question

Quizplus · Accepted Answer

An injection of killed or attenuated Salmonella typhi would provide the individual's immune system with antigens that are recognizable to the immune system. Memory cells would then form to prevent future cases of typhoid fever. This type of vaccine is known as a subunit vaccine. Option A is incorrect because a successful vaccine should not cause a mild case of the disease in the individual. Option C is incorrect because the vaccine would only provide protection against Salmonella typhi, not other bacteria. Option D is incorrect because the injection would not provide premade antibodies, but instead, stimulate the body's immune system to produce its own antibodies.

How Would You Expect an Injection of Killed or Attenuated