Passive immunity lasts only as long as the antibodies survive in body fluids, and an antibody is a protein that attaches to an antigen. Given these facts, what lasts only as long as the proteins that attach to an antigen survive in body fluids among the following options:
- hospitalization
 - recovery
 - parasites
 - solid, liquid, gas
 - Leptospirosis
 - Allergies
 - resistance
 - passive immunity


 

        passive immunity 