<unk>  is a deficiency of T<unk> s, caused by decreased function of individual T<unk> s, it causes an immunodeficiency of<unk> -mediated immunity. T<unk> s normal function is to help with the human body's immunity, they are one of the two primary types of lymphocytes(the other being B<unk> s).
T cell deficiency
IgG deficiency
Thymic hypoplasia
Humoral immune deficiency
Combined immunodeficiencies
Primary immunodeficiency
Leukocyte adhesion molecule deficiency
Leukocyte adhesion deficiency