|Live bird markets considered a major concern.|
Researchers are also concerned that the number of cases could rise as winter approaches. H5N1 has already established seasonal patterns, and they fear if H7N9 does the same the entire continent could be adversely affected over the next few months.
Various strains of bird flu have been fostered and amplified in southeastern Asia, due largely to unsanitary conditions throughout the food preparation process. While H5N1 has been the most persistent (having remained a consistent threat since first reported in 1987), H7N9 is the most disconcerting for researchers. Discovered less than seven months ago, it is the first bird flu to accomplish human-to-human transmission; as of August 31st H7N9 has killed 45 people.
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