Does MMR vaccine last for life?

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  1. #decline
  2. #virtually
  3. #gradually
  4. #lasting
  5. #protection
  6. #against
  7. #lower
  8. #measles
  9. #rubella
  10. #everyone
  11. #several
  12. #doses
  13. #little
  14. #after
  15. #appears
  16. #years
  17. #protected
  18. #seems
  19. #mumps