If passive immunity lasts only as long as the proteins that attach to an antigen survive in body fluids, then what lasts only as long as the proteins that attach to an antigen survive in body fluids?

Answer choices:
- hospitalization
 - recovery
 - parasites
 - solid, liquid, gas
 - Leptospirosis
 - Allergies
 - resistance
 - passive immunity

 

        passive immunity  