- Number Needed to Treat (NNT).
- Relative Risk Reduction (RRR).
- Absolute Risk Reduction (ARR).
- Efficacy (or Vaccine Efficacy).
28. In a medicinal trial, a drug’s effectiveness is assessed by comparing the rate of disease in the treated group to the rate in the placebo group. What technical measure of effect is typically reported for vaccine studies, but applicable here?
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