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In this article, Sawyer and his colleagues described their successful quest for a reliable way to preserve yellow fever virus so that strains of virus found in West Africa and Brazil could be compared in a controlled study.
Periodical. Sawyer, Wilbur A., Wray Lloyd, and S. F. Kitchen. "The Preservation of Yellow Fever Virus." Journal of Experimental Medicine 50, (1929): 1-13. Article. 13 Images.. Journal of Experimental Medicine