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Definition of Slow virus

Slow virus: A virus that has a long incubation period before the onset of a very gradual progressive disease. Typically, the diseases caused by slow viruses affect the central nervous system and are associated with a variety of nervous system symptoms while having a characteristically protracted, progressive clinical course.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=21581
Last Editorial Review: 6/9/2016

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