Systemic lupus erythematosus (SLE or lupus) is a chronic autoimmune disease that is potentially debilitating and sometimes fatal as the immune system attacks the body’s cells and tissue, resulting in inflammation and tissue damage. SLE can affect any part of the body, but often harms the heart, joints, skin, lungs, blood vessels, kidneys and nervous system. The course of the disease is unpredictable, with periods of illness (called flares) alternating with remission.

Drug-induced lupus erythematosus (DIL or DILE) is a recognized sub-catgory of systemic lupus erythematosus (SLE), induced by the use of certain drugs or vaccines. It is well documented that vaccination can cause an autoimmune response (the body attacks its own cells) and produce this form of SLE.