1. First, clean the inside of the subject’s nose, remove foreign matter, and prepare the test tube for nasal swabs and other necessities

2. Then, conduct the test The patient's head is slightly tilted back, and the swab is slowly inserted into the nasopharynx along the nasal septum until resistance is felt

Approximate position of the nasal swab

3. Place the nasal swab in this position for a few seconds to absorb the secretions, then slowly rotate and remove the nasal swab

4. After the operation is completed, open the sampling tube and insert the swab into the sampling tube , discard the remainder of the swab, label the sampling tube, and place it in a biohazard bag.