World Health Organization assistant director general Keiji Fukuda attends a plenary session of the WHO Summit "Influenza Lessons Learned and Preparedness", in Cancun, Mexico, on July 3, 2009. Getty Images logo Getty Images 31 months ago

World Health Organization assistant director general Keiji Fukuda attends a plenary session of the WHO Summit "Influenza Lessons Learned and Preparedness", in Cancun, Mexico, on July 3, 2009.