| 31. | It's a difference that helps make smallpox so much more dangerous than vaccinia.
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| 32. | Hill said the MVA strain of vaccinia is a safer strain of the smallpox vaccine.
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| 33. | At some point, the virus in use was no longer cowpox, but vaccinia.
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| 34. | The virus may be isolated or the infection diagnosed serologically by methods appropriate to vaccinia.
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| 35. | Four orthopoxviruses cause infection in humans : variola, vaccinia, cowpox, and monkeypox.
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| 36. | It begins with a natural virus called vaccinia, a close relative of the smallpox virus.
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| 37. | Participants in these clinical trials will be asked to donate vaccinia immune globulin, Fauci said.
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| 38. | Many suffered serious adverse reactions to the vaccinia virus that is used to help confer immunity.
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| 39. | The virus in the vaccine is not smallpox itself, but a related virus called Vaccinia.
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| 40. | About 100 recipients are expected to need treatment with vaccinia immune globulin, cidofovir or both.
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