The protection of medical personnel during nasopharyngeal swab collection, pharyngeal swab collection, packaging and transfer, as well as the patient's body position, operation technique, collection site and precautions during specimen collection were explained in detail and demonstrated by relevant staff on site.

Subsequently, Mr. Chuanjiang He explained the coding of specimens and other issues, showing each operation detail in detail to each participant.

At present, for the collection of swab specimens of neocoronavirus pneumonia, the common ways are pharyngeal swab and nasopharyngeal swab.

In order to accurately collect qualified nasopharyngeal and pharyngeal swab specimens, health care workers must maintain a very close face-to-face distance with the patient and insert the nasopharyngeal swab into the patient's nasal cavity, at which time the patient is prone to nasal itching and other irritating discomfort and even sneezing; for oropharyngeal swab testing, the tongue is pressed down with a tongue depressor and the sampling swab is probed into the throat, which in turn is prone to dry heaving, coughing, and even vomiting.

The resulting droplets spread in the air, and in such a dangerous situation, health care workers may be infected at any time, therefore, the collection personnel should carry out three levels of protection, wearing protective clothing, goggles, protective face screens, gloves, etc.