2. Do not smoke, drink or chew gum within 30 minutes before sampling;

3. Try to sample in a separate closed space, open the window for ventilation after sampling, and don't touch the swab sampling crown (swab front end) with your hands or other objects at any time;

4. When collecting oropharyngeal swabs, the examiner leans back and opens his mouth to make an "ah" sound, which helps to expose his throat. There is no special discomfort during the sampling process, but some sensitive personnel may have symptoms such as irritating dry cough, nausea and vomiting, which can be relieved after rest. The examiner can cooperate with the collector to relax and take a deep breath as much as possible, and most people can avoid discomfort;

5. Testers should wear masks and prepare spare masks at the same time, and the interpersonal distance should be kept above 1 m to avoid crowding;

6. When taking a throat swab sample, take off the mask, fold it, put it in a plastic bag and put it in a pocket. Wash or wipe your hands with disposable alcohol immediately after collecting samples, put on a spare mask, and put the discarded mask into the designated medical trash can;

7. Before collecting nasopharyngeal swab, the inspector should inform the collector whether the nasal septum is bent and the history of nasal surgery. In this process, there may be a feeling of itchy nose, which stimulates sneezing. You can immediately cover it with a paper towel or elbow;

8. A small amount of nosebleed may appear after nasopharyngeal swab collection, and generally no special treatment is needed. If there is a lot of bleeding, please go to the hospital for treatment in time.

In addition, serum antibody detection is not affected by diet, so fasting is not needed.

Extended data:

Four key groups of nucleic acid detection:

1, those with related symptoms

Cough, fever and other related symptoms, especially those who may have been exposed to confirmed cases recently.

2. Workers in key positions

Medical staff, restaurant waiters, police, take-away, deliveryman.

3. Personnel in high-risk areas

People in the area where the confirmed cases are located and their close contacts should also be paid attention to.

4. Recent immigrants and close contacts