David Ross Harper, Director General of Britain's Health Improvement and Protection Directorate, 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 7 months ago

David Ross Harper, Director General of Britain's Health Improvement and Protection Directorate, 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.