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.
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.
Can you boost your immune system against the coronavirus (COVID-19)?
It's OK to feel anxious about the novel coronavirus, COVID-19. Here's what you can do to protect yourself from viruses — and what won't help, such as face masks or supplements.
Autoimmune diseases strike when the immune system attacks healthy cells in the body. Read about the causes, symptoms and treatment options.
Lupus is a disease of the body’s immune system. Although its causes are not yet entirely known, lupus treatments are available.
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.
Lymphoma is a cancer that affects the immune system. Find out about diagnosis, symptoms, treatments and complications.
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.
Immunotherapy is a type of cancer treatment that boosts the immune system so it can fight the cancer. Learn how it works and which cancer types immunotherapy can treat.