In general, the incubation period of neocoronavirus infection can be detected by nucleic acid testing. In general, the incubation period of the new crown is 1~14 days, and most of them are 3~7 days. The incubation period of nucleic acid test can be detected by throat swab or blood for viral nucleic acid test. Even some of them can’t be detected, the sensitivity of the test reagent and the viral content will affect the test result. Therefore, it is usually necessary to do the test several times to ensure the accuracy of the test. Nucleic acid testing is performed on the RNA of the new coronavirus, and is usually done to look for the presence of nucleic acid from the invading virus in the patient’s respiratory specimen to determine whether or not the patient has been infected by the new coronavirus. Therefore, a “positive” nucleic acid test is proof of the presence of the virus in the patient’s body. Most patients in the incubation phase of novel coronavirus infection can be detected by nucleic acid testing, but a very small percentage cannot be detected.