Margaret Chan, Director General of World Health Organization, attends the first summit of "Lessons Learned and Preparedness of Swine Flu" in Cancun July 2, 2009. The international event shared and analyzed the experiences and opinions of ministers and experts from around the world. Reuters Pictures 4 months ago

Margaret Chan, Director General of World Health Organization, attends the first summit of "Lessons Learned and Preparedness of Swine Flu" in Cancun July 2, 2009. The international event shared and analyzed the experiences and opinions of ministers and experts from around the world.