The bird flu virus had infected a total of three hundred thirty-eight people by December twelfth. *
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People would have begun their inmunization with a new vaccine. *
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They call major kinds of influenza type A, B and C. Type C as the least serious. *
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The flu virus would spread quickly to large numbers of people in many countries. *
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They will not have enough time to identify it and produce a vaccine. *
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Medical experts have recognized for some time that people become infected with influenza during the winter months. *
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Researchers in New York carried out twenty experiments with guinea pigs to investigate how the virus spreads. *
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Wild and farm birds often have a flu virus. *
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Results of the study were reported in PLoS Pathogens *
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The virus could survive in the air and low humidity for a longer time. *
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