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.
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.
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.
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.
Autoimmune diseases strike when the immune system attacks healthy cells in the body. Read about the causes, symptoms and treatment options.
Allergies and hypersensitivities
An allergic reaction occurs when the immune system overreacts to a foreign substance that usually causes few or no problems in most people.
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.
Lupus is a disease of the body’s immune system. Although its causes are not yet entirely known, lupus treatments are available.
Lymphoma is a cancer that affects the immune system. Although lymphoma is a serious disease, good treatment options are available.
Vaccinations and pregnancy
The immune system can weaken during pregnancy, so you can be more susceptible to infections and illnesses. Certain vaccinations are recommended.