Do viruses live forever?

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  1. #cells
  2. #virus
  3. #inside
  4. #completely
  5. #viruses
  6. #permanent
  7. #system
  8. #certain
  9. #infection
  10. #avoid
  11. #bodies
  12. #totally
  13. #immune
  14. #being
  15. #cause
  16. #removed