A new crown nucleic acid test review means that another nucleic acid test is required. 1. If you have recently traveled to an area where there is an outbreak, then even if the first nucleic acid test result is negative, you still need to take the test again because the incubation period of the new coronavirus is long, up to 14 days, so there may be the possibility of false negatives, and you need to take the test several times. 2. It is also necessary to review the test if there is a problem with the test, such as a problem with the test reagent or an operator error that results in incorrect entry of information. 3. If a positive patient is found during the mixed nucleic acid test, the individual needs to be retested for final confirmation. If reminded of the need for review, home isolation is required according to the requirements of the HAC, wearing a mask during isolation and avoiding contact with people in the same house.