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| pho·to·phe·re·sis [ ftəfə rssiss ] or pho·to·pho·re·sis [ ftəfə rssiss ] |
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immune enhancement using photoactive drugs: a technique used to enhance the immune system in which a photoactive drug such as psoralen is injected into the body. Blood is removed, exposed to ultraviolet light to activate the drug, then returned to the body to fight the disease.
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