(Of 
T cells). 
T cells are lymphocytes (white blood cells) that are formed in the 
thymus and are part of the 
immune system; they have been found to be abnormal in people with 
AIDS. The normal ratio of helper 
T cells (CD4+ cells) to suppressor 
T cells (CD8+ cells) is approximately 2:1. This becomes inverted in people with 
AIDS, but may be abnormal for a 
host of other temporary reasons. See also 
CD4 (
T4) or CD4+ Cells; 
CD8 (
T8) Cells; 
Lymphocyte; 
Thymus.