Other participant characteristics described in Table 1 are marital status, age at firstsexual contact, total number of lifetime partners, use of tobacco, total number ofpregnancies, miscarriages, date of last menstruation and their HIV-related history,such as time since the diagnosis of HIV infection, baseline absolute CD4 cell count,whether on antiretroviral therapy (ART) or not on ART, absolute CD4 cell count atthe start of ART, history of any opportunistic infections, their clinical staging ofHIV according to the WHO and signs of RTI. The gene discussed is CD4; the disease is HIV infectious disease.