Access a search engine (http://www.yahoo.com or http://www.altavista.com or http://www.hotbot.com for example) on the World Wide Web. Search using the term "emerging diseases". Add terms like WHO (World Health Organization) or CDC (Center for Disease Control and Prevention) will refine your search and take you to several appropriate web sites. Identify the top 10 emerging diseases in the United States and worldwide. What types of infectious diseases are the most common? Why do you think that these diseases are "emerging" at this time in history and with our current level of science?