The day of the nucleic acid test counts as one day, and the statute of limitations for nucleic acid testing ranges from 7 days, after which a new measurement is usually required. In some special cases, if you have been to a high-risk site, you may need a nucleic acid test within 48 hours or 24 hours, so it is important to take care of the specific testing time and try to avoid a situation where you need to retest after missing the time. The time limit for nucleic acid testing is set at 7 days because the incubation period for the new coronavirus vaccine is mostly around 3-7 days. However, a small number of people may have an incubation period of up to 14 days. Therefore, even if you have had a nucleic acid test and the test result is negative, if you develop fever, cough, dizziness, headache, runny nose, or other abnormalities afterwards, you should go to the fever clinic at the hospital and have the nucleic acid test performed again in a timely manner to avoid a long incubation period for the new coronavirus in your body, which may lead to missed tests. Those who have no discomfort or history of exposure can leave the testing office after the test is completed and pick up the online electronic nucleic acid test report according to the prompt time or go to the testing office to pick up the paper report according to the voucher. However, for those who go to the fever clinic and require nucleic acid testing, after the nucleic acid test is done, they need to stay in the hospital for observation and wait for the results of the nucleic acid test report and receive the nucleic acid test report and confirm that it is correct before leaving. When doing the nucleic acid test, it is recommended to wear a good mask, bring valid personal documents such as ID card, medical insurance card, etc. Avoid drinking, smoking, chewing gum, etc. before sampling.