SPIEGEL: Do you think the WHO declared a pandemic prematurely?
Jefferson: Don't you think there's something noteworthy about the fact that the WHO has changed its definition of pandemic? The old definition was a new virus, which went around quickly, for which you didn't have immunity, and which created a high morbidity and mortality rate. Now the last two have been dropped, and that's how swine flu has been categorized as a pandemic.
According to the World Health Organization (WHO), a pandemic can start when three conditions have been met: emergence of a disease new to a population; agents infect humans, causing serious illness; agents spread easily and sustainably among humans.
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