Microbiology General ce8f98d8 IL-I is produced by A Macrophage B Helper T lymphocytes C B cells D Cytotoxic T-cells High-Yield Explanation Ans. (a) Macrophage Ref. Ananthanarayan 8/e, p 148, 9/e, p 154; Robbin's 7/e, p 82 Already explained in answer no. 5