What is the difference between 3-day nucleic acid test and 7-day nucleic acid test? What is the difference between mixed nucleic acid detection and individual nucleic acid detection?

What is the difference between 1 3-day nucleic acid detection and 7-day nucleic acid detection mainly lies in the different effective time of nucleic acid.

For example, a 3-day nucleic acid test is effective within 3 days from the time of nucleic acid sampling, while a 7-day nucleic acid test requires a negative result within 7 days. This time is generally stipulated, which is mostly used for business trips and return to work. However, the incubation period of pneumonia in COVID-19 is very long, some of which can reach 65,438+04 days, and it is contagious during the incubation period after COVID-19 infection. Sometimes it is not enough to look at the specific validity period of the nucleic acid test report, but also to judge according to the investigation of the patient's epidemic contact history.

If it is a high-risk area, the patient has symptoms such as fever, fatigue and dry cough. Even if COVID-19's nucleic acid test is negative, it is suggested to re-test the nucleic acid immediately. Only if the nucleic acid test is negative for many times can the possibility of COVID-19 infection be ruled out.

The difference between mixed nucleic acid detection and individual detection is 1, and individual detection is 1. Everyone's nucleic acid samples are put in the collection box, and everyone has to check them once. The test results are aimed at a single sample, and the accuracy of the results is high. However, when carrying out large-scale inspection, it is easy to affect the efficiency of inspection because of the heavy workload.

2. Mixed detection is to put the nucleic acid samples of many people in a collection box, which can greatly improve the work efficiency, but it also has some disadvantages, that is, once these samples of many people are tested positive together, it means that one of these people has been infected, so it is necessary to re-test many people separately.

Therefore, at present, the mixed inspection and individual detection of nucleic acids will be arranged according to the risk of epidemic spread in this area, such as:

1. Centralized isolation points and other key populations are subject to single sampling and single inspection.

2. Conduct single sampling inspection or 1 household 1 tube for the personnel in the closed control area.

3. Mixed mining of 10 and 1 can be implemented in the control area.

4. The prevention area and other areas can implement 20 1 mixed mining.

5. In the case that the single-sample single-tested object is not positive after several rounds of testing, the mixed sampling of 10 and 1 can be implemented as appropriate.

3 nucleic acid detection, mixed detection and individual detection, which is faster? Generally speaking, personal testing is faster.

Because most of the mixed tests are aimed at large-scale population collection, and the sampling range is low-risk areas, while the risk of COVID-19 infection is generally high for individual tests. Although both samples will be sent to a nucleic acid testing institution with a laboratory for testing before the results can be obtained, only the samples are recognized in the testing process, and individual testing is usually marked as emergency testing, so the time to obtain the results is generally faster than that of mixed testing, and the results are obtained within 6 hours, while most mixed testing results within 24 hours.

4. The interval of nucleic acid detection is less than 24 hours. Can I do it again? Yes

Although the interval between two nucleic acid tests in COVID-19 is generally more than 24 hours, when it is necessary to repeat the COVID-19 nucleic acid test and how long the interval depends on the purpose of the nucleic acid test. For example, for patients with suspected cases in COVID-19 or COVID-19, or patients with positive results for the first time, the interval between the second COVID-19 nucleic acid test may be shorter, and it is necessary to conduct multiple negative nucleic acid tests to show that they are not contagious.

Especially the entry personnel from COVID-19 epidemic areas will be stricter. When they are released from isolation, they usually need to collect nucleic acids twice at the same time. These two nucleic acids should be detected by different reagents, preferably in different detection institutions, and the isolation can be lifted only if the results are negative at the same time.