slow virus

noun Pathology.
a virus that remains dormant in the body for a long time before producing symptoms, as in several neurological diseases, including kuru and Creutzfeldt-Jakob disease.

Origin:
1950–55

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World English Dictionary
slow virus
 
n
any of a class of virus-like disease-causing agents known as prions that are present in the body for a long time before becoming active or infectious and are very resistant to radiation and similar factors: believed to be the cause of BSE and scrapie

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

slow virus n.
Any of a group of animal viruses that cause various diseases that exhibit an unusually slow progressive course, as Creutzfeldt-Jakob disease. Also called lentivirus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Encephalitis can closely follow measles, or it can occur years later during adolescence as a result of a slow virus infection.
Unspecified slow virus infection of central nervous system.
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