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Naturally produced substances in the blood that destroy or neutralise specific toxins or foreign bodies, for example, viruses. They are produced by the white blood cells known as lymphocytes in response to exposure to the antigens of the foreign body against which they act. They form an important part of the body’s defence system against infection.

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Last updated on April 17th, 2023

Developed by the Leukaemia Foundation in consultation with people living with a blood cancer, Leukaemia Foundation support staff, haematology nursing staff and/or Australian clinical haematologists. This content is provided for information purposes only and we urge you to always seek advice from a registered health care professional for diagnosis, treatment and answers to your medical questions, including the suitability of a particular therapy, service, product or treatment in your circumstances. The Leukaemia Foundation shall not bear any liability for any person relying on the materials contained on this website.