MCQOPTIONS
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| 1. |
E. Jenner prepared the vaccine for smallpox virus using: |
| A. | Attenuated cowpox virus |
| B. | Attenuated smallpox virus |
| C. | Large dose of smallpox virus |
| D. | Small dose of smallpox virus |
| Answer» B. Attenuated smallpox virus | |