<prompt> Features of innate immunity AE-Recognizes foreign antigen in bloodC reactive proteinComplement protein is a pa of innate immune systemIncludes phagocytes and natural killer cells  <response>: Robbins basic pathology 9th edition page no 105 Headingthe early innate immune response to microbes Innate immunity includes phagocytes like macrophages and neutrophils. Natural killer cells kill viruse infected cells and produce macrophage activating cytokine IFN-gamma. 