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During the first quarter of 2008, we are once again witness to a seasonal resurgence
of reported disease outbreaks due to H5N1 avian influenza. So far
this year, human cases and deaths due to H5N1 have been confirmed
in Indonesia, Vietnam and China. These sporadic human cases fall
within the context of resurgent animal outbreaks of H5N1 disease
across 18 countries since December 2007. Most of these outbreaks
have occurred in poultry populations, including chickens, turkeys,
geese, and ducks. However, a few in China, Poland, and the United
Kingdom have involved wild birds. The resurgent pattern of avian
and human cases reminds us that H5N1 remains endemic across a broad
swath of Eurasian, Middle-East, and Aftican geography, and can
be expected to periodically infect both commercial and domestic
poultry flock in those regions of the world for years to come.
This report presents a brief summary of significant H5N1 events so far
in 2008.
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