Objectives: To establish the normal reference range for CD4 lymphocyte cells in human immunodeficiency virus (HIV) negative sub-Saharan Africans attending the Genito-Urinary and Infectious Diseases (GUIDE) Outpatient Clinic at St. James’s Hospital in Dublin. To correlate CD4 Count with lymphocyte count. Design: This was a prospective observational study. Methods: Volunteers were recruited among...