Johns Hopkins HIV Guide
CD4 Cell Count
DEFINITION
- Number of CD4 cells (T-helper lymphocytes with CD4 cell surface marker), used to assess immune status, susceptibility to OIs, urgency of ART, need for OI prophylaxis, and for defining AIDS (CD4 < 200).
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Last updated: May 8, 2022
Citation
Hoffmann, Christopher J, and Joel E Gallant. "CD4 Cell Count." Johns Hopkins HIV Guide, The Johns Hopkins University, 2022. Johns Hopkins Guides, www.hopkinsguides.com/hopkins/view/Johns_Hopkins_HIV_Guide/545031/all/CD4_Cell_Count.
Hoffmann CJ, Gallant JE. CD4 Cell Count. Johns Hopkins HIV Guide. The Johns Hopkins University; 2022. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_HIV_Guide/545031/all/CD4_Cell_Count. Accessed October 15, 2025.
Hoffmann, C. J., & Gallant, J. E. (2022). CD4 Cell Count. In Johns Hopkins HIV Guide. The Johns Hopkins University. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_HIV_Guide/545031/all/CD4_Cell_Count
Hoffmann CJ, Gallant JE. CD4 Cell Count [Internet]. In: Johns Hopkins HIV Guide. The Johns Hopkins University; 2022. [cited 2025 October 15]. Available from: https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_HIV_Guide/545031/all/CD4_Cell_Count.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC
T1 - CD4 Cell Count
ID - 545031
A1 - Hoffmann,Christopher,M.D., M.P.H.
AU - Gallant,Joel,M.D., M.P.H.
Y1 - 2022/05/08/
BT - Johns Hopkins HIV Guide
UR - https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_HIV_Guide/545031/all/CD4_Cell_Count
PB - The Johns Hopkins University
DB - Johns Hopkins Guides
DP - Unbound Medicine
ER -
