Range: ±4e8 cells/liter
||Human Homo sapiens
||Ligthart GJ, Schuit HR, Hijmans W. Subpopulations of mononuclear cells in ageing: expansion of the null cell compartment and decrease in the number of T and B cells in human blood. Immunology. 1985 May55(1):15-21.PubMed ID3873404
||T cells from blood samples from 25 persons aged 25-34 years were enumerated with anti-Leu 4 FITC and
also with a TRITC-labelled IgG fraction of a horse
anti-human T-cell antiserum.
||1×10^9-2.5×10^9 cells/L given by Janeway's immunobiology