Under normal circumstances nucleic acid single test and nucleic acid mixed test produce results at the same speed. Nucleic acid testing is categorized into single test and mixed test. Nucleic acid mixed test reduces the cost burden of individual testing and does not affect the time of issuing the test report. Nucleic Acid Single Test and Nucleic Acid Mixed Test take the same amount of time to test in the laboratory, and the results are generally available within 24 hours. Nucleic acid mixing is more suitable for large-scale, grouped screening than single nucleic acid testing, usually in groups of 5, 10 or 20 people. In small-scale outbreaks, the use of mixed tests can improve efficiency and serve the purposes of multiple screening, early diagnosis, reduction of transmission, and social cost savings. Prevention is the key to the new coronavirus. Avoid contact with the outside world and wear a mask when going to public places. Personal hygiene and frequent disinfection are important to reduce the chance of contracting novel coronavirus through these preventive measures.