You are presented with the question "What results when an immune response to a pathogen produces memory cells?" and the following answer choices: 
- anemia
 - vaccination
 - kill them
 - competition
 - lie detectors
 - rapid expansion
 - killing insects
 - it needs them

Now knowing that active immunity results when an immune response to a pathogen produces memory cells and vaccination is Active Acquired Immunity, choose the best answer.


 

  vaccination       