How Would You Expect an Injection of Killed or Attenuated

question 14

Multiple Choice

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

• A) The injection would cause the individual to have a mild case of typhoid fever, but would protect against future cases of typhoid fever.
• B) The injection would provide antigens recognizable by the immune system and memory cells would form to prevent typhoid fever in the future.
• C) The injection would provide cross-protection to prevent several diseases caused by different bacteria.
• D) The injection would provide the individual with premade antibodies capable of binding to and inactivating Salmonella typhi.

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