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University of Nebraska Medical Center

How nations are preparing for a possible H5N1 bird flu pandemic

Nature Bird flu could become a human pandemic. How are countries preparing?

As cases of avian influenza continue to rise in cattle in the United States, countries are preparing for the possibility that the virus could start spreading in people. Many nations are ramping up surveillance, as well as purchasing vaccines or developing new ones.

“This virus in its current state does not look like it has the characteristics of causing a pandemic. But with influenza viruses, that equation could entirely change with a single mutation,” says Scott Hensley, an immunologist at the University of Pennsylvania in Philadelphia.

The highly pathogenic avian influenza H5N1 has so far been detected in 145 cattle herds and 4 farm workers in a dozen states across the United States. Researchers say many more cases in cows and people have probably gone undetected. The chances of quashing the outbreak get “more slim by the day”, says Angela Rasmussen, a virologist at the University of Saskatchewan in Saskatoon, Canada.

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