Nucleic acid testing is a method to detect the presence of neo-coronavirus infection by retaining airway secretions and is the basis for the diagnosis of neo-coronavirus infection. Try not to drink alcohol 30 minutes before the nucleic acid test to avoid adverse reactions such as nausea and vomiting when doing the nucleic acid test. It is not advisable to drink alcohol 30 minutes before the nucleic acid test because after drinking alcohol will stimulate the mucous membrane cells of the digestive system and induce contractile spasm in the gastrointestinal tract, and then if the throat swab stimulates the pharynx during the nucleic acid test, symptoms such as nausea and vomiting will easily occur. In addition, alcohol consumption can have an impact on liver and kidney function, which can add uncertainty to the results of nucleic acid testing. Nucleic acid testing should also be noted before sampling 2 hours before eating, the first 30 minutes can not smoke, can not drink, can not chew gum, so as not to affect the process and results of nucleic acid testing, sampling waiting process pay attention to maintain a distance of one meter, immediately after the collection of a mask, hand washing disinfection.