World Health Organisation (WHO) Director General Margaret Chan (C) gestures between U.S. Secretary of Health and Human Services Kathleen Sebelius (L) and her Canadian counterpart Leona Aglukkaq prior to a high-level consultation meeting on Influenza A (H1N1) on the side line of the WHO World health assembly's annual meeting on May 18, 2009 at the UN Offices in Geneva. The WHO's annual assembly opened with the spectre of a global flu pandemic hanging over the gathering following a sharp spike in swine flu infections in Japan. Getty Images logo Getty Images 6 months ago

World Health Organisation (WHO) Director General Margaret Chan (C) gestures between U.S. Secretary of Health and Human Services Kathleen Sebelius (L) and her Canadian counterpart Leona Aglukkaq prior to a high-level consultation meeting on Influenza A (H1N1) on the side line of the WHO World health assembly's annual meeting on May 18, 2009 at the UN Offices in Geneva. The WHO's annual assembly opened with the spectre of a global flu pandemic hanging over the gathering following a sharp spike in swine flu infections in Japan.