How HIV Weakens the Immune System: CD4+ T Cell Destruction and AIDS
HIV’s primary impact is the progressive destruction of CD4+ T helper cells, which coordinate immune defenses. The virus binds, integrates into host DNA, and kills these cells.
As CD4+ counts decline, the body becomes vulnerable to opportunistic infections (Pneumocystis pneumonia, toxoplasmosis, fungal diseases) and cancers (Kaposi sarcoma, non-Hodgkin lymphoma).
When CD4+ drops below 200 cells/µL, the condition is classified as AIDS (Acquired Immunodeficiency Syndrome), with sharply increased risk of life-threatening complications.
WHO reports ~1.5 million new HIV diagnoses globally in 2023. Early detection and antiretroviral therapy (ART) preserve CD4+ counts, maintain immune function, and prevent AIDS progression.
Resources: WHO HIV overview, CDC HIV facts.
HIV & AIDS - Related Articles
- Runny Nose and HIV: No Direct Link
- Malaria Susceptibility: Genetic Factors, Not Racial Immunity
- Compassionate Care for People with HIV/AIDS: Principles for Equitable Treatment
- Thrush (Oral Candidiasis): Symptoms, Causes & Risk Factors
- Understanding HIV Medication: Side Effects & Treatment
- How AIDS Impacts Families: Social, Economic, and Emotional Effects
- HIV Transmission: Can You Get It from Scabs?