Emerging Viruses: The Evolution of Viruses and Viral Diseases Author(s): Stephen S. Morse and Ann Schluederberg Source: The Journal of Infectious Diseases, Vol. 162, No. 1 (Jul., 1990), pp. 1-7 Published by: Oxford University Press Stable URL: http://www.jstor.org/stable/30127833 Accessed: 18-08-2014 21:02 UTC Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact
[email protected]. Oxford University Press is collaborating with JSTOR to digitize, preserve and extend access to The Journal of Infectious Diseases. http://www.jstor.org This content downloaded from 155.58.212.160 on Mon, 18 Aug 2014 21:02:31 UTC All use subject to JSTOR Terms and Conditions 1 Fromthe NationalInstitute of Allergy and Infectious Diseases, the FogartyInternational Center of the National Institutesof Health, and the RockefellerUniversity Emerging Viruses: The Evolution of Viruses and Viral Diseases Stephen S. Morse and Ann Schluederberg From the Rockefeller University,New York,New York,and the National Institute of Allergy and InfectiousDiseases, National Institutesof Health, Bethesda, Maryland Challengedby the sudden appearanceof AIDS as a major rus and host can follow severalpossible lines, and pathogens public healthcrisis, the National Instituteof Allergy and In- may not always evolve towardslower virulence.