Alterations in CD4⁺ Expression, FoxP3, and Regulatory T Cells in Iraqi Patients with Pulmonary Tuberculosis: A Case–Control Study.
Background: Effective control of Mycobacterium tuberculosis relies on CD4⁺ T cells, whereas regulatory T cells (Tregs) restrain excessive immune responses. Changes in the balance of these cell populations may contribute to tuberculosis pathogenesis. This study aimed to assess the CD4⁺ T-cell expression and Treg frequen...