The Nurse Is Performing Tuberculosis ( TB ) Screening in a Clinic

The nurse is performing tuberculosis ( TB ) screening in a clinic that has many patients who have immigrated to the United States. Before doing a TB skin test on a patient, which question is most important for the nurse to ask?

A) "Is there any family history of TB?"
B) "Have you received the bacille Calmette-Guérin ( BCG ) vaccine for TB?"
C) "How long have you lived in the United States?"
D) "Do you take any over-the-counter ( OTC ) medications?"