Margaret Chan is the Director-General of the World Health Organisation. The first female Director of Health of Hong Kong, she was praised for her response to the 1997 outbreak of avian flu and for her handling of the later SARS crisis. Currently serving her second term as head of the WHO, Chan has been at the forefront of campaigns to improve global healthcare for diseases such as Malaria and HIV and Aids. In 2009, she became the first WHO chief to announce a global pandemic after the emergence of swine flu. The Guardian has described Chan as “the most powerful international public health official in history” (the Guardian).