| 41. | He studied cowpox vaccine from Bernard Jean Bettelheim, the first Christian missionary to Ryukyu, in 1846.
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| 42. | He had done a long-term experiment, and began to give cowpox vaccine two years later.
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| 43. | Although Jenner had used cowpox virus, a third virus, vaccinia, became the standard vaccine against smallpox.
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| 44. | Some experienced mild fevers and armpit soreness _ a signal that their lymph glands were fighting the localized cowpox.
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| 45. | He is studying the pill in mice infected with the cowpox virus, which is closely related to smallpox.
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| 46. | Some viruses express caspase inhibitors that inhibit caspase activity and an example is the CrmA protein of cowpox viruses.
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| 47. | The cowpox virus contains 186 thousand base pairs of DNA, which contains the information for about 187 genes.
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| 48. | Jesty and two of his female servants, Ann Notley and Mary Reade, had been infected with cowpox.
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| 49. | Experts say vaccinia is related to the smallpox and cowpox viruses, but its origin is a major scientific mystery.
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| 50. | Knowledge of the ability of cowpox to provide immunity from smallpox was present in England before Jenner's discovery.
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