Immune system
Your body's immune system is designed to protect you from, or get rid of, infection. Find out more about how the immune system works.
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Can you boost your immune system against the COVID-19 coronavirus?
It's OK to feel anxious about the COVID-19 coronavirus. Here's what you can do to protect yourself from viruses — and what won't help, such as vitamin supplements.
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Zinc and your health
Zinc is a mineral that is essential for many of the body's normal functions and systems, including the immune system, wound healing, blood clotting, thyroid function, and the senses of taste and smell.
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Lymph nodes
Lymph nodes filter blood and fight infection. They also play an important role in cancer diagnosis. Find out more about lymph nodes and how they work.
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Autoimmune conditions
Autoimmune diseases strike when the immune system attacks healthy cells in the body. Read about the causes, symptoms and treatment options.
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Adenoids
The adenoids are small lumps of soft tissue found at the back of the nose in children. Healthy adenoids are part of young kids’ immune systems.
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Allergies and hypersensitivities
An allergic reaction occurs when the immune system overreacts to a substance. Find out about common allergies, their symptoms and treatments.
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Lupus
Lupus is a disease of the body’s immune system. Although its causes are not yet entirely known, lupus treatments are available.
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Lymphoma
Lymphoma is a cancer that affects the immune system. Although lymphoma is a serious disease, good treatment options are available.
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Food allergies
Some people have an allergic reaction to a normally harmless ingredient or type of food. This immune system response can range from mild to severe.
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