Now, these two cells are essentially cells that can engulf our pathogen and destroy that pathogen once they actually engulf. Now, these cells aren't specific to the type of pathogen they actually engulfed. They engulf anything that is foreign to the body. And finally, we also have the process of inflammation and fever. So different types of chemicals inside our body can initiate the process of inflammation. And as we'll see in the next several lectures what inflammation actually does, it localizes our infection and it helps bring different types of immune agents, for example, phagocytes and neutrophils to that infected area.