Epitope {Ans: Specific region on an antigen that interacts with antibodies}Inflammation {Ans: Response of the immune system to infection or injury, characterized by redness, swelling, and pain}Macrophages {Ans: Immune cells that engulf and destroy pathogens}Viral replication {Ans: Process of viral reproduction within host cells}Interferon {Ans: Protein produced by immune cells that inhibits viral replication}TNF-alpha {Ans: Protein that stimulates fever and immune responses}ID50 {Ans: Infectious dose that will cause an infection in 50 percent of the test population}Pathogens {Ans: Microorganisms that cause disease}Sweat ducts {Ans: Tubes in the skin that carry sweat to the surface}Incompatible blood transfusions {Ans: Transfusions in which the donor and recipient blood types do not match}Type I hypersensitivity {Ans: Allergic reaction mediated by IgE antibodies}Agglutination {Ans: Clumping of antigens by antibodies}Nutrients {Ans: Substances required by microorganisms for growth and survival}Neutrophils {Ans: Type of white blood cell involved in phagocytosis}Opsonization {Ans: Coating of pathogens with antibodies to enhance phagocytosis}Skin {Ans: Protective outer covering of the body}Antigen-binding sites {Ans: Regions on antibodies that bind to antigens}Interleukin-1 {Ans: Protein that stimulates fever and immune responses}Bacterial cell lysis {Ans: Destruction of bacterial