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Lupus patient. Portrait of Niels Morgensen, the first person to be cured of a lupus vulgaris infection by Danish physician Niels Finsen (1860-1904) using the technique of phototherapy. This phototherapy was developed by Finsen after he had discovered that shortwave blue or ultraviolet light could be used to kill bacteria. Lupus vulgaris, an infection of the skin by the Mycobacterium tuberculosis bacillus, had previously been thought incurable. The disease begins as as painless, dark red patches which spread, ulcerate and cause extensive scarring.
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