Tests and terminology in psoriasis: I

the biochemical complex that protects the body against infections and other foreign bodies that lead to illness

drugs that alter the function of the immune system

the invasion of the body by microorganisms that reproduce and multiply, causing disease

reaction by tissue, for example skin, in response to infection or injury, usually involving reddening and swelling

the process by which a volunteer for a clinical trial agrees to participate after being fully informed regarding purposes of the trial, risks and benefits associated with participation in the trial, and whether volunteers will be randomised to receive treatment or placebo

psoriasis characterised by smooth, inflamed lesions in body folds.