You are presented with the question "What lasts only as long as the proteins that attach to an antigen survive in body fluids?" and the following answer choices: 
- hospitalization
 - recovery
 - parasites
 - solid, liquid, gas
 - Leptospirosis
 - Allergies
 - resistance
 - passive immunity

Now knowing that passive immunity lasts only as long as the antibodies survive in body fluids and an antibody is a protein that attaches to an antigen, choose the best answer.


 

        passive immunity 