What is herd immunity simple definition?

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Tags

1. #disease
2. #immune
3. #population
4. #called
5. #infection
6. #occurs
7. #large
8. #measure
9. #indirect
10. #become
11. #providing
12. #community
13. #protection
14. #percentage
15. #infectious
16. #social
17. #immunity
18. #thereby
19. #effect
20. #individuals