| med. |
A type of lymphocyte. CD4 T lymphocytes CD4 cells help coordinate the immune response by stimulating other immune cells, such as macrophages, B lymphocytes B cells, and CD8 T lymphocytes CD8 cells, to fight infection. HIV weakens the immune system by destroying CD4 cells. see also CD4 count, CD4 percentage, lymphocyte, T lymphocyte |
