SARS and avian influenza have many common features. They both arose in Asia and originated from animal viruses. They both have the potential to become pandemics because human beings lack antibodies to the animal-derived antigens present on the viral surface and rapid dissemination can occur from the relative ease and availability of high speed and far-reaching transportation methods. Pediatricians, in particular, should remain alert about the possibility of pandemic illnesses in their patients. Annual rates of influenza in children may be 1.5 to 3 times those in the adult population, and infection rates during a community epidemic may exceed 40% in preschool-aged children and 30% in school-aged children. Infected children also play a central role in disseminating influenza, as they are the major point of entry for the virus into the household, from which adults spread disease into the community. Of course, children younger than 24 months also are at high risk for complications from influenza. A 1999 Centers for Disease Control and Prevention projection of an influenza pandemic in the US paints a grim picture: 89,000 to 207,000 deaths, 314,000 to 734,000 hospitalizations, 18 million to 42 million outpatient visits, and 20 million to 47 million additional illnesses, at a cost to society of at least dollars 71.3 billion to dollars 166.5 billion. High-risk patients (15% of the population) would account for approximately 84% of all deaths. Although SARS has been kind to the pediatric population so far, there are no guarantees that future outbreaks would be as sparing. To aid readers in remaining up-to-date with SARS and avian influenza, some useful websites are listed in the Sidebar. Two masters of suspense, Alfred Hitchcock and Stephen King, may have been closer to the truth than they ever would have believed. Both birds and a super flu could bring about the end of civilization as we know it. But all is not lost--to paraphrase Thomas Jefferson, the price of health is eternal vigilance. Although we may not be able to prevent future pandemics, mankind has the ability to recognize new diseases and outbreaks as they occur, to study these infections and find ways to contain and treat them, and to implement the necessary measures to defeat them.

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   |texte=   When animal viruses attack: SARS and avian influenza.
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