A: No. Abnormal nucleic acid detection does not mean that COVID-19 is diagnosed, and further investigation is needed to make a diagnosis. The results of nucleic acid detection may be biased in different situations, resulting in "false negative" and "false positive" results.
"False negative": The main reason is that COVID-19 patients have a "window period" and the amount of detoxification is small. When sampling infected people, it can't be detected or the test results can't reach the positive standard.
"False Positive": The reagent is mainly contaminated during the process of sample collection, transportation and testing, and the test result is positive, so it needs to be re-sampled.
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What should be paid attention to before nucleic acid detection:
A: Nucleic acid detection is an important means to quickly detect virus infection. The most common method is "oropharyngeal swab sampling", that is, smear the throat with a sampling swab and brush the epithelial cells in the throat. The public should pay attention to:
In order to avoid affecting the test results, citizens are not allowed to eat within 2 hours before sampling, and are not allowed to drink water, smoke, drink alcohol or eat chewing gum within 30 minutes before sampling.
Please bring your ID card and mobile phone and wear a mask correctly when sampling. Take off the mask before sampling and put it on immediately after sampling. Spare masks can be prepared and replaced at any time to prevent pollution.