Low CD4 cell count in HIV-negative persons.
D015496:CD4-Positive T-Lymphocytes; D002487:Centers for Disease Control and Prevention, U.S.; D006679:HIV Seropositivity / Q000097:blood* / Q000453:epidemiology; D006801:Humans; D008231:Lymphopenia / Q000097:blood* / Q000453:epidemiology; D011159:Population Surveillance; D014481:United States