How many people did smallpox kill?

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Tags

1. #deaths
2. #smallpox
3. #estimated
4. #those
5. #responsible
6. #occurred
7. #during
8. #cases
9. #world
10. #1950s
11. #between
12. #children
13. #infected
14. #early
15. #century
16. #million
17. #disease