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The CD4+ T cell count is an important determinant of disease stage and prognosis in human immunodeficiency virus (HIV)-infected individuals. This study evaluated the CD4+ T cell counts in individuals at the time of diagnosis of HIV infection at 4 community clinics in large urban settings with relatively high frequencies of HIV infection. Of 2223 individuals, 57% and 36% had CD4+ T cell counts < 350 and < 200 cells/mm(3), respectively, at the time of diagnosis. There were no clear differences by sex or race. Enhanced educational efforts regarding the importance of HIV testing for at-risk individuals across sex and race strata in community settings may be important for early identification of individuals with HIV infection. This in turn could impact efforts to reduce transmission, and it could impact the prognosis for patients who receive antiretroviral therapy. Copyright © 2002 Infectious Diseases Society of America [ABSTRACT FROM AUTHOR]