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Predicting hotspots for future flu outbreaks
Date:3/14/2013

This year's unusually long and rocky flu season would be nothing compared to the pandemic that could occur if bird flu became highly contagious among humans, which is why UCLA researchers and their colleagues are creating new ways to predict where an outbreak could emerge.

"Using surveillance of influenza cases in humans and birds, we've come up with a technique to predict sites where these viruses could mix and generate a future pandemic," said lead author Trevon Fuller, a UCLA postdoctoral research fellow at the Institute of the Environment and Sustainability's Center for Tropical Research.

The researchers' models revealed that coastal and central China and Egypt's Nile Delta are danger zones where bird flu could combine with human flu to create a virulent kind of super-flu. Governments can prioritize these zones and use the researchers' models to identify other hotspots for increased monitoring of flu in humans, livestock, poultry and wild birds. That could help detect a novel flu virus before it spreads worldwide, the researchers said.

The research paper, "Predicting Hotspots for Influenza Virus Reassortment," was published March 13 in the peer-reviewed public health journal Emerging Infectious Diseases.

Previous pandemics, such as the 1957 and 1968 influenzas that each killed more than a million people or the 2009 H1N1 swine flu outbreak that killed 280,000 worldwide, developed when viruses from humans and animals exchanged genes to create a new virus in a process called reassortment. Recent research using mice confirms that genes from bird flu and human flu can combine to create dangerous new flu strains. Swine, which are susceptible to both bird and human flu, could serve as a mixing vessel for reassortment between the two viruses.

"The mixing of genetic material between the seasonal human flu virus and bird flu can create novel virus strains that are more lethal than either of the original
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Contact: Alison Hewitt
ahewitt@support.ucla.edu
310-206-5461
University of California - Los Angeles
Source:Eurekalert

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