Which Information About a Patient Who Has a Recent History

Which information about a patient who has a recent history of tuberculosis ( TB ) indicates that the nurse can discontinue airborne isolation precautions?

A) Chest x-ray shows no upper lobe infiltrates.
B) TB medications have been taken for 6 months.
C) Mantoux testing shows an induration of 10 mm.
D) Three sputum smears for acid-fast bacilli are negative.

Correct Answer:

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