No results were found in the nucleic acid test of all employees in Qinghai.

1, the time is too short: at present, it takes 6-8 hours for ordinary nucleic acid test results provided by medical institutions, and about 3 hours for emergency treatment. If the nucleic acid detection time is too short, the results haven't come out yet.

2. There are many samples to be tested: if it is a collective test and a large number of samples are collected at the same time, queuing for nucleic acid testing will affect the test results, which may be delayed to about 12-24 hours.

2. Round-trip delay: the specimen needs to be sent to a higher-level hospital for testing, which will delay the time on the way back and forth, and the time for producing results will naturally be delayed, generally not exceeding 48 hours.

3. Sample loss: samples are lost for various reasons. If there is still no result within 36-48 hours after the test, you can consult the testing institution. If you confirm that it is lost, you need to get it again.

Nucleic acid detection generally refers to nucleic acid detection methods. The substance of nucleic acid detection is the nucleic acid of virus. Nucleic acid detection is to determine whether the patient is infected by COVID-19 by detecting whether there is nucleic acid of foreign invasive virus in respiratory tract samples, blood or feces.