What does a negative titer mean?

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Tags

  1. #measures
  2. #vaccinated
  3. #negative
  4. #immunity
  5. #taken
  6. #equivocal
  7. #titer
  8. #disease
  9. #antibodies
  10. #amount
  11. #presence
  12. #enough
  13. #laboratory
  14. #sample
  15. #tested
  16. #blood
  17. #prove