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from | Encarta |  |
Bird Flu |
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| Avian influenza, more commonly known as bird flu, is a type of influenza that affects birds and can infect humans. Here, health authorities in China are vaccinating a chicken against the H5N1 avian influenza virus as part of a free vaccination program for backyard poultry. | ||||||
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| Alex Hofford/epa/Corbis | ||||||
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| Appears in these articles: | ||||||
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| Avian Flu; Influenza; Public Health | ||||||
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