You can do a nucleic acid test after eating.
The primary method of nucleic acid testing is PCR fluorescence, which is the gold standard for diagnosing the presence of novel coronavirus pneumonia. Sampling is usually done with a throat swab or nasal swab, and usually having a nucleic acid test after eating does not affect the results.
For people with sensitive throat, if the sample is taken immediately after eating a full meal, it may cause nausea and vomiting due to the irritation of the throat. If the sample is contaminated by vomit, it may affect the nucleic acid test result.
Therefore, it is not recommended to do the nucleic acid test immediately after meals, and it is generally recommended to do the test about 2 hours after meals.
[Tip] In this article, “new coronary pneumonia, new coronary virus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronary virus infection”.