The World Health Organization on Monday stepped closer to declaring the spread of swine flu a global epidemic, although officials caution that worldwide contagion is not a foregone conclusion.
Representatives of the United Nations agency, convening in Geneva, raised the pandemic alert system to its highest level yet, Phase 4, indicating that human-to-human transmission is causing community outbreaks. . . .
USATODAY.com - April 27, 2009
http://www.usatoday.com/news/health/2009-04-27-flu-united-states-who_N.htm?csp=34
