Nucleic acid testing refers to the nucleic acid test for novel coronavirus pneumonia. There is no clinical rule on what not to eat before the test, but it is generally recommended that you do not eat anything in case the sensitive person may vomit during the sampling process. In most cases, pharyngeal swabs and nasopharyngeal swabs will be used to collect specimens for the nucleic acid test for novel coronavirus pneumonia. During specimen collection, the swabs will irritate the posterior wall of the pharynx, which is prone to nausea and even vomiting after being irritated. Therefore, for people whose throat is too sensitive, it is recommended to avoid eating before the nucleic acid test, but it is not mandatory not to eat, as long as it does not affect the results of the nucleic acid test and does not cause discomfort, it is possible to eat before the test. In addition, try not to smoke or chew gum for half an hour before the test, as this will easily affect the oral hygiene, thus affecting the results of the viral nucleic acid test. New coronavirus pneumonia nucleic acid testing process should cooperate with the medical staff to take the appropriate action, do not stay too long in the sampling point, continue to do a good job of personal protection after sampling, etc.. In short, they should be through the whole process of personal protection and active cooperation, so that the nucleic acid test in an orderly manner. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.