[Washington, D.C., January 13. Image via Getty]

Two-year-old Claire Davis wears a sticker after having her H1N1 vaccination injected at a community clinic in Washington, DC, on January 13, 2010. Swine flu has killed at least 12,799 people worldwide since it first emerged in Mexico in March 2009, the World Health Organisation said on January 8, 2010. The Americas continue to report the biggest number of casualties with at least 6,880 deaths while in Europe, at least 2,554 people have died from the (H1N1) virus. AFP PHOTO/Jewel SAMAD (Photo credit should read JEWEL SAMAD/AFP/Getty Images)