Nucleic acid results never come out may be caused by short interval time, excessive amount of nucleic acid and wrong information registration. 1. Short interval time: Generally, the results will only be available six hours after the nucleic acid test, and if the interval time is relatively short, the nucleic acid results may not be available. 2. Excessive amount of nucleic acid: when there is an epidemic outbreak in some areas and the whole staff needs to be tested for nucleic acid, the workload of the relevant staff is larger, and the nucleic acid results may not come out all the time. 3. Wrong information registration: When doing nucleic acid testing, wrong information registration, such as wrong name or ID card number, may lead to the phenomenon that nucleic acid results have not been available. If the nucleic acid test taker is in a hurry and the nucleic acid test result has not been available for 24 hours, he/she can go to the testing point of the local hospital to consult or go to the hospital to get a paper report.