Thus, chemotactic factor CCL7 recruits  leukocytes to infected tissues to mediate the immune response. Furthermore, CCL7 has an influence to diapedesis and extravasation of leukocytes.
As a result, the chemical signal CCL7 summons immune cells to the sites of infection, thereby initiating an immune response. Furthermore, CCL7 plays a role in guiding these immune cells through the tissues and out of the bloodstream.