Nucleic acid tests for COVID-19 plays an important role in preventing and preventing the spread and progress of the epidemic. The mixed collection of covid-19 nucleic acid test samples is beneficial to enhance the nucleic acid detection ability.

The mixed collection of samples is mainly aimed at low-risk groups. The mixed collection of samples is mainly aimed at low-risk groups, and it has two modes. One is to sample several people, such as 3 or 5 people, and put samples into the same sampling tube. This mode is also called "mixed sampling". The other In the laboratory test, the samples of 3 or 5 people are mixed together in the same volume, which is also called "mixing of samples".

Compared with single detection, mixed nucleic acid detection greatly improves detection efficiency, speeds up detection time, and effectively improves detection capabilities.

Experts pointed out that ，when conducting mixed sampling, special attention should be paid to the registration of personnel information to ensure traceability between the sample number and the subject. According to their own conditions, various places use single swab sampling and double swab sampling at the same time to ensure the accuracy of the test results.

Double swab sampling at the same time refers to sampling one person with two swabs at the same time, placing one swab into a single-sample green sample tube for retention, and the other swab is placed in  red sample tube which for the mixed samples.

If the test results of the mixed sample are negative, it means that the inspected persons are not infected and no re-examination is required. If the  results are positive, then can check and check the single sample in the corresponding green tube according to the sample registration information.