A 6-year-old girl suffering from severe psoriasis had been treated unsuccessfully by various conventional methods. She developed measles and, on recovery from measles, the psoriasis soon cleared up and now, 6 months later, she still has had no further recurrence. The basic defect in psoriasis, basal cell hyperplasia and defective keratinization, may well be immunologically mediated. Measles virus, by its immunosuppressive effect can lead to remission of psoriasis.