According to WHO recommend，The nasopharyngeal swab / nasal swab is the preferred testing swab for swab-based covid testing.

The specific sampling protocol for nasopharyngeal swab is as follows:

2. Quickly put the nasal swab into this sampling tube.

3. Break the nasopharyngeal swab at the breakpoint, discard the handle end and tighten the cap.

4. Freshly collected specimens should be transported to the laboratory within 48 hours (2 days) at 2-8°C. For longer term storage, the specimen should be storage at -70°C or below. After the specimens are sent to the laboratory, nucleic acid extraction should be performed as soon as possible.

5. After sampling, fill in the related information on the tube label.

Alternatives to Nasopharyngeal Collection

if can not collect by nasopharyngeal specimen, please refer to following options listed,

· An oropharyngeal swab / oral swab specimen collected by a healthcare professional (HCP)

· A throat swab specimen collected by a healthcare professional (HCP)

· An anterior nasal swab / anterior nares swab specimen collected by patient or HCP