| 11. | Cidofovir is toxic and untested against vaccinia in humans.
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| 12. | A : The vaccine is made from a related virus, called Vaccinia.
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| 13. | Vaccinia can also infect those who touch someone else's vaccination site.
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| 14. | Thus, the vaccinia virus avoids the immune system.
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| 15. | Structurally BPXV looks like other OPVs and especially Vaccinia Virus ( VACV ).
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| 16. | Dryvax is a live-virus preparation of vaccinia prepared from calf lymph.
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| 17. | Vaccines containing vaccinia viruses were used effectively in the campaign to eradicate smallpox.
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| 18. | It is based on vaccinia, a close but harmless relative of smallpox virus.
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| 19. | Vaccinia-based vaccines played a major role in eliminating smallpox throughout the world.
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| 20. | The method involves infecting calves with vaccinia, a virus related to small pox.
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