progressive vaccinia

Medical Dictionary

progressive vaccinia n.
A severe or even fatal form of vaccinia occurring as a complication of smallpox vaccination chiefly in persons with an immunologic deficiency or dyscrasia, characterized by progressive enlargement of the initial and secondary lesions.

The American Heritage® Stedman's Medical Dictionary
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WordNet
progressive vaccinia

noun
a severe or even fatal form of vaccinia that occurs mainly in persons with an immunological deficiency; characterized by progressive enlargement of the initial lesion 
WordNet® 3.0, © 2006 by Princeton University.
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