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NIH grantees rebut theory that seasonal flu strains originate in tropical regions
Date:11/16/2011

els of genetic diversity among flu strains and no seasonal fluctuations were found in the tropical regions.

"We found that the H3N2 influenza virus population is constantly moving between regions, and every region is a potential source for new epidemics," said Dr. Bahl. "Regions with more connections to others, such as travel centers, may contribute more to the global diversity of circulating viruses."

The complexity of the global virus circulation found in the study suggests that efforts to control flu should include region-specific strategies, according to the researchers. In future studies, the researchers intend to examine whether the virus behaves differently in temperate and tropical areas, including regions not included in this analysis, and in places that are more or less connected to the rest of the world.


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Contact: Nalini Padmanabhan
padmanabhannm@niaid.nih.gov
301-402-1663
NIH/National Institute of Allergy and Infectious Diseases
Source:Eurekalert

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