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    • Immunodeficiencies
    • Autoimmunity
    • Hypersensitivity

    These arise when one or more parts of the immune system do not function. They can result from: 1. a condition that a person is born with, known asTrusted Sourceprimary immunodeficiency 2. developments over time, for instance, older age 3. a disease that affects the immune system, such as HIV, malnutrition, obesity, or high alcohol use 4. medical tr...

    In autoimmune conditions, the immune system mistakenly targetsTrusted Sourcehealthy cells rather than pathogens or faulty cells. It is unable to distinguish between healthy and unhealthy cells and tissue. Usually, this will occur in one part of the body, such as the pancreas. Destruction of pancreatic beta cells means the body cannot produceTrusted...

    With hypersensitivity, the immune system reactsTrusted Sourcein an exaggerated or inappropriate way. It attacks everyday substances, such as dust, as if they were pathogens. This happens with: 1. asthma 2. food allergies and sensitivities 3. atopic eczema A severe reaction can lead to anaphylactic shock, where the body responds to an allergen so st...

  1. In biology, immunity is the state of being insusceptible or resistant to a noxious agent or process, especially a pathogen or infectious disease. Immunity may occur naturally or be produced by prior exposure or immunization.

  2. Oct 20, 2023 · Your immune system is a large network of organs, white blood cells, proteins and chemicals. These parts all work together to protect you from germs and other invaders. Your immune system also helps your body heal from infections and injuries.

  3. 2 days ago · Immune system, the complex group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing entities. Immunity from disease is conferred by two cooperative defense systems: innate immunity and acquired immunity. Learn more about the immune system’s mechanisms and evolution.

  4. Mar 28, 2024 · While researchers explore the effects of diet, exercise, age, psychological stress, and other factors on immune response, general healthy-living strategies can boost your immune system.

  5. IMMUNITY definition: 1. a situation in which you are protected against disease or from legal action: 2. a situation in…. Learn more.

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