Immune responses play a critical role from "summary" of Harrison's Principles of Internal Medicine, Twenty-First Edition (Vol.1 & Vol.2) by Joseph Loscalzo,Anthony S. Fauci,Dennis L. Kasper,Stephen Hauser,Dan Longo,J. Larry Jameson
The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful pathogens. It plays a critical role in protecting the body from infections and diseases by recognizing and destroying invading microorganisms. When the immune system detects a foreign invader, such as a virus or bacteria, it mounts a coordinated response to eliminate the threat. This response involves the activation of various immune cells, such as T cells, B cells, and macrophages, which work together to identify and destroy the pathogen. The immune system also has the ability to remember past encounters with pathogens, allowing it to mount a more rapid and effective response upon subsequent exposure. This is the basis for immunological memory, which is the key to the success of vaccines in preventing infectious diseases. In addition to defending against infections, the immune system also plays a role in maintaining tissue homeostasis and regulating inflammatory responses. Dysregulation of the immune system can lead to autoimmune diseases, where the immune system mistakenly attacks the body's own tissues, or immune deficiencies, where the body is unable to mount an effective immune response.- The immune system is a vital component of the body's defense mechanisms, and its proper functioning is essential for maintaining health and well-being. By understanding the complexities of immune responses, we can develop new strategies for preventing and treating a wide range of diseases that impact human health.
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