| 31. | The search for the 1918 influenza virus has apparently created little stir in Spitsbergen.
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| 32. | In nature, influenza viruses circulate continuously among animals, especially birds.
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| 33. | Influenza viruses are almost unique in their ability to spread rapidly around the world.
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| 34. | Both the H2N2 and H3N2 pandemic flu strains contained genes from avian influenza viruses.
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| 35. | Different influenza viruses encode for different hemagglutinin and neuraminidase proteins.
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| 36. | Effective and safe vaccines have been developed for influenza viruses.
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| 37. | Influenza viruses have a relatively high mutation rate that is characteristic of RNA viruses.
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| 38. | Rational design of potent sialidase-based inhibitors of influenza virus replication.
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| 39. | Influenza virus C is different from type A and B in its growth requirements.
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| 40. | Neuraminidase is an antigenic glycoprotein enzyme found on the surface of the influenza viruses.
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