Our immune system is responsible for protecting us from diseases and infections. When our body detects a foreign agent, it triggers an immune response or defense mechanism. There are several types of immune responses, such as innate and adaptive immunity. Innate immunity refers to the body's natural defense mechanism, while adaptive immunity is the response generated by the body after exposure to an antigen. Other synonyms for immune response or defense include resistance, protection, immunity, defense mechanism, and immune reaction. These terms are often used interchangeably in medical literature and research. Understanding the different types of immune responses is crucial for medical professionals and researchers to develop effective treatments and vaccines for various diseases.