Nucleic acid testing with phlegm in the throat will not affect the results. Sputum in the throat does not affect the viral load in body fluids. Nucleic acid test technology is characterized by high sensitivity and good specificity, therefore, nucleic acid test for sputum in the throat will not affect the accuracy of the results. If there is a suspicion of novel coronavirus pneumonia causing symptoms of phlegm in the throat, a sputum specimen can be obtained for nucleic acid testing. If the result is negative, it means that you are not infected with the virus, but if the result is positive, it means that you have been infected with the virus. It is recommended that you eat or skip meals 2 hours before the nucleic acid test and refrain from drinking, smoking and chewing gum for 30 minutes before the test, and wear a mask when doing the nucleic acid test to avoid cross-infection. If the nucleic acid test results show positive, you should actively cooperate with the doctor for treatment, if necessary, need to isolate the treatment. Tips] In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.