MCQOPTIONS
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| 1. |
The coronavirus vaccine developed by Oxford University and AstraZeneca was how much per cent effective at preventing symptomatic illness, in a large US trial? |
| A. | 41 |
| B. | 54 |
| C. | 68 |
| D. | 79 |
| E. | 87 |
| Answer» E. 87 | |