immunocompetence

Immunocompetence is the ability of the body to produce a normal immune response following exposure to an antigen. Immunocompetence is the opposite of immunodeficiency or immuno-incompetent or immuno-compromised. Examples include:

• a newborn who does not yet have a fully functioning immune system but may have maternally transmitted antibodies - immunodeficient;
• a late stage AIDS patient with a failed or failing immune system - immuno-incompetent; or
• a transplant recipient taking medication so their body will not reject the donated organ - immunocompromised.

There may be cases of overlap but these terms all describe immune system not fully functioning.