World Health Organization director general Margaret Chan (2-R), Canada's Health Minister Leona Aglukkag (R), Mexican Health Minister Jose Angel Cordova (2-L) and US Health and Human Service Minister Kathleeen Sebelius (L) give their thumbs up during the family picture of the WHO Summit "Influenza Lessons Learned and Preparedness", in Cancun, Mexico, on July 2, 2009. Getty Images logo Getty Images 5 months ago

World Health Organization director general Margaret Chan (2-R), Canada's Health Minister Leona Aglukkag (R), Mexican Health Minister Jose Angel Cordova (2-L) and US Health and Human Service Minister Kathleeen Sebelius (L) give their thumbs up during the family picture of the WHO Summit "Influenza Lessons Learned and Preparedness", in Cancun, Mexico, on July 2, 2009.