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.
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.
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.
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.
HIV and AIDS medication (antiretrovirals)
Medications used to fight HIV are called antiretrovirals. They work to stop the virus multiplying and help protect the immune system from damage caused by HIV.
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.
Overview of autoimmune diseases
Autoimmune diseases occur when the immune system attacks its own body. Learn more about the diagnosis and treatment of types such as Coeliac disease and lupus.