We conducted a survey among patients diagnosed with HIV infection and reviewed their medical records to collect the following information; age, sex, presence of pain or numbness, duration of pain or numbness, duration of HIV infection, clusters of differentiation 4 (CD4) T-cell count, ribonucleic acid (RNA) load, diagnosis and duration of acquired immune deficiency syndrome (AIDS), treatment status and duration of highly active antiretroviral therapy (HAART). This evidence concerns the gene CD4 and AIDS.