You need to pay attention to the following points when doing the nucleic acid test: 1. Try not to take medication 2 days before the nucleic acid test to avoid the effect on the test result. 2. Ensure enough sleep before the nucleic acid test, do not smoke or drink, and keep your mood relaxed. 3. Avoid the use of cold and irritating food before the nucleic acid test, and avoid eating too much to avoid dryness and vomiting due to the stimulation of the pharynx and tonsils during the pharyngeal test collection. 4. When waiting in line at the site, be sure to wear a good mask, and at the same time with the front and back of the queue to ensure that the distance between the people above 1 meter, if the local can be booked online, you can choose to book online, staggered detection, to avoid crowds gathering.