Do you need nucleic acid testing when you come back from traveling abroad?

You don't have to do it as long as it's not in a high-risk area, but you need to show your health code and take your temperature. You don't need to do nucleic acid testing when traveling. Just do personal protection and update the effective health code at any time. If you come back from overseas or epidemic-prone areas, you should not only do nucleic acid testing, but also isolate 14 days.

Nucleic acid detection needs sampling, sample retention, preservation, nucleic acid extraction and computer detection. Among them, the first step is to collect human secretions and wipe the nasal cavity or posterior pharyngeal wall and bilateral pharyngeal tonsils with nasal swab or pharyngeal swab; In the second step, the medical staff are required to keep the sample, immerse the swab head in the cell preservation solution, and tighten the tube cover immediately after the tail is cut off.

Extended data:

For nucleic acid detection in novel coronavirus, samples were collected according to the "Sample Requirements" section of the kit instructions. Routine sample types include throat swab, nasal swab, sputum, bronchial lavage fluid, alveolar lavage fluid and so on.

After obtaining patient samples, it is necessary to test them as soon as possible. If the samples that need to be transported cannot be tested immediately, they shall be packaged at low temperature according to the requirements of the instructions and sent to a special testing institution for testing. After receiving the sample, the testing institution shall extract nucleic acid from the sample, and the nucleic acid extraction reagent shall use the nucleic acid extraction kit specified in the approved product specification.

Viral RNA needs to be reverse transcribed into cDNA before amplification and detection. PCR amplification and detection should use the fluorescent quantitative PCR instrument specified in the approved product manual. The Ct value of the sample obtained by fluorescence quantitative PCR can determine whether the patient sample contains novel coronavirus.

Baidu encyclopedia-nucleic acid detection method