What is efficacy vs effectiveness?

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Tags

1. #intervention
2. #whereas
3. #studies
4. #circumstances
5. #progression
6. #performance
7. #world
8. #trials
9. #placed
10. #continuum
11. #efficacy
12. #conditions
13. #controlled
14. #refers
15. #under
16. #effectiveness
17. #defined
18. #ideal