Suggest a method to ensure an anamnestic response in humans.
When a person encounters a particular antigen, he/she responds to it which is known as primary immune response. When this antigen is introduced again in the body of that person, the antibodies produced during primary response reappear rapidly. This is known as secondary response or anamnestic response. So by administering the dead pathogen/attenuated pathogen or antigen in the body of the person can ensure secondary immune response due to production of memory cells in the body.