The CD4 count looks at immune cells affected by HIV. It is done for: assess immune strength in HIV.
General health information, not a diagnosis. In an emergency, call 102. Always consult a qualified health professional.
Assess immune strength in HIV.
No fasting needed. Laboratory-specific; see the reference range on your report. High or positive may mean: Stronger immunity. Low or negative may mean: Weakened immunity, higher infection risk. General information, not a diagnosis. Results must be interpreted by a qualified health worker.
Immune cells affected by HIV.
Blood
Stronger immunity.
Weakened immunity, higher infection risk.
Reference ranges vary by lab, age and sex — always use the range printed on your own report.
Consult a doctor to interpret results — a single test does not make a diagnosis.
Uses your location once to list the nearest facilities. Nothing is stored.
What does the CD4 count measure?
Immune cells affected by HIV.
Why is the CD4 count done?
Assess immune strength in HIV.
Do I need to fast for the CD4 count?
No fasting needed.
What does a high or positive CD4 count mean?
Stronger immunity.
What does a low or negative CD4 count mean?
Weakened immunity, higher infection risk.
What is the normal range for the CD4 count?
Laboratory-specific; see the reference range on your report.
Why is CD4 count done?
Assess immune strength in HIV.
Do I need to prepare or fast for CD4 count?
No fasting needed. Laboratory-specific; see the reference range on your report. High or positive may mean: Stronger immunity. Low or negative may mean: Weakened immunity, higher infection risk. General information, not a diagnosis. Results must be interpreted by a qualified health worker.
SI text CC BY 4.0; decoder reference data (cited per range); LOINC codes free with attribution (notice included).
Sources: SI health summary (own words); MedlinePlus Lab Tests and CDC as references