We also did not find an association between HRM scores and the other variables examined, which included infant CD4 cell count % at birth, infant HIV viral load at 14 weeks, maternal CD4 cell count at delivery, maternal HIV viral load at delivery, HIV infection in utero, infant NVP resistance at 6–8 weeks of age, and HIV subtype (data not shown). The gene discussed is CD4; the disease is HIV infectious disease.