Before the nucleic acid test, you should be careful to wear a mask, avoid eating, and prepare a health code in advance. Drinking, eating and smoking should be avoided 30 minutes before sampling. Sampling personnel should be informed of their own history of nasopharyngitis in a timely manner before sampling. Wear a good mask, avoid talking to each other, and keep the spacing distance of one meter or more. If the pharynx is sensitive, it is recommended to try to perform the examination on an empty stomach to prevent vomiting. Scan the health code in advance to obtain correct identification information. To do a nasopharyngeal swab or oropharyngeal swab, the staff will prepare a swab, tilt the head and put the swab into the nostril, the swab touches the nasopharynx at the back, and then take the mucosal secretion. An oropharyngeal swab is taken with the mouth open and the staff member will apply and rub the swab on the oropharynx to take the specimen. There may be slight localized discomfort during swabbing, but it is not significant and is short-lived.