The CD4 count was 3 cells/μL (reference: 200–3390 cells/μL) and the HIV RNA was 109,000 copies/mL (reference: not detected) Computed tomography of the chest revealed nodular opacities in both lower lobes with scattered areas of ground glass opacities consistent with pneumonia (Fig. 1). The gene discussed is CD4; the disease is susceptibility to pneumonia measurement.