"Given the current size and mobility of the human population, emerging diseases pose a continuing threat to global health. This threat became reality with the outbreak of severe acute respiratory syndrome (SARS). The emergence of a disease requires two steps: introduction into the human population and perpetuated transmission. Although preventing the introduction of a new disease is ideal, containing a zoonosis is a necessity. The lessons that we have learned from SARS were the topic of a meeting of The Royal Society on January 13, 2004, in London, England." This Conference Summary details the conclusions of that meeting.
Center for Disease Control and Prevention: http://www.cdc.gov/
Emerging Infectious Diseases (July 2004), v.10 no.7