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Title: How can we be sure?
Authors: Fenner, Frank
Issue Date: May-1980
Language: English
Abstract: lt is difficult to prove that a disease no longer exists on earth. But a mass of carefully compiled evidence has convinced the Global Commission that Smallpox Target Zero has in truth been attained
Subject: Smallpox
Disease Eradication
URI: http://www.who.int/iris/handle/10665/202498
Appears in Collections:Journal Articles



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