Eating oranges before doing the new crown nucleic acid will not affect the test results. After eating oranges or other foods, the throat will be stimulated when doing the nucleic acid, which may cause nausea and vomiting and other discomforts, so it is recommended to fast before doing the nucleic acid. Nucleic acid is done through the nasopharyngeal and oropharyngeal swabs, the use of enzyme immunoassay to detect the RNA of the new coronavirus, and the method of detection of high sensitivity, as long as there is the presence of pathogens, it will be able to detect its RNA, and do nucleic acid before eating oranges will not affect the detection of the nucleic acid of the new coronavirus. Although eating oranges before the nucleic acid test will not affect the test results, but eating oranges before the nucleic acid test may lead to nausea and vomiting and other uncomfortable symptoms when the patient is doing a throat swab, so it is recommended that you should not eat before the nucleic acid test, overfeeding, fasting is recommended, and to avoid gargling, smoking, and so on.