A nurse is caring for multiple patients in a medical-surgical unit. Which situation requires the nurse to implement contact precautions immediately?

• 1 A patient with pneumonia caused by Streptococcus pneumoniae who is receiving antibiotic therapy
• 2 A patient with tuberculosis who has been on anti-TB medications for 3 weeks and has three consecutive negative sputum cultures
• 3 A patient with influenza A who is in a private room and has been on antiviral therapy for 48 hours
• 4 A patient with Clostridioides difficile infection who has had 6 loose stools in the past 24 hours ✓ 정답

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