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Mutant Bird Flu: Test Yourself

Wynne Parry, LiveScience Senior Writer
Date: 23 February 2012 Time: 01:12 PM ET
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Experiments that modified the H5N1 bird flu virus so it could spread, airborne, between ferrets, created a furor. We test your knowledge of these mutant flu viruses.
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Ferret and H5N1 research. Researchers altered bird flu viruses so they spread between ferrets through the air.
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