Eating oranges does not affect the results of the nucleic acid test, but it is generally recommended that you do not eat for half an hour prior to the nucleic acid test to avoid irritation of the pharynx during the throat swab test causing nausea, vomiting and other symptoms. Specific instructions are as follows: When performing nucleic acid testing, nasal swab or pharyngeal swab samples are usually chosen for testing more often. Clinically, there is no saying that you cannot eat when doing nucleic acid testing, and eating will not affect the results of nucleic acid testing. However, pharyngeal swab and nasal swab test will cause some irritation to the pharynx. Generally, it is not recommended to eat within half an hour before collecting the pharyngeal swab for nucleic acid test, in order to try to avoid irritation of the pharynx during pharyngeal swab test, which may cause nausea, vomiting and other symptoms. When doing nucleic acid test, you need to wear a good mask in the queuing process, avoid talking with people, suggest that the interval between people is more than two meters, and after the specimen collection is completed, you should quickly leave the crowd, change the new disposable medical mask, and do a good job of hand disinfection.