**The acquired [[Immunoglobulins|antibodies]] are used in combination with [[Adaptive Immune System - WikiBlood#Antigen Recognition|antigen]], and catabolised by the body, meaning protection is gradually lost | **The acquired [[Immunoglobulins|antibodies]] are used in combination with [[Adaptive Immune System - WikiBlood#Antigen Recognition|antigen]], and catabolised by the body, meaning protection is gradually lost |