CCTV News:A few days ago, the State Council organized and formulated the "Covid-19 Antigen Detection Application Scheme (Trial)" in response to the comprehensive group of novel coronavirus epidemic prevention and control mechanism, and decided to add antigen detection as a supplement on the basis of nucleic acid detection. What is antigen testing? What are the suitable populations for antigen testing? Can self-test results replace nucleic acid results? Let’s look at the expert’s interpretation.
According to the person in charge of the Clinical Laboratory Center of the National Health and Wellness Commission, compared with nucleic acid detection, antigen detection can be faster and more convenient to operate, but its accuracy is lower, and it is generally used in the early stage of infection.
Li Jinming, Deputy Director of Clinical Laboratory Center of National Health and Wellness Commission:Because there are four kinds of structural proteins in COVID-19, the protein N is the largest in COVID-19 (among structural protein antigens), and it will be released in our pharynx after infection, so we can determine whether it is possible to infect Covid-19.
Experts said that nucleic acid detection is still the basis for the diagnosis of Covid-19 infection, and antigen detection as a supplementary means can be used for screening specific people, which is conducive to improving the ability of "early detection".
Li Jinming, Deputy Director of Clinical Laboratory Center of National Health and Wellness Commission:Antigen testing can’t replace nucleic acid testing, but it can find out the possible source of infection in time, and then do nucleic acid-related testing.
The relevant person in charge of the National Health and Wellness Commission said that at present, due to the superposition of imported cases and local cases, the current epidemic situation in China is in a state of local gathering and multi-distribution. According to the characteristics of transmission in Omicron, the monitoring mode of "antigen screening and nucleic acid diagnosis" should be popularized, so that people can buy their own tests, which is conducive to early detection and improve the sensitivity of monitoring and early warning.
Li Jinming, Deputy Director of Clinical Laboratory Center of National Health and Wellness Commission:Because (cases) are scattered, how to control them, so it is the most important application scenario to push out antigens at this time.
Three types of people are suitable for antigen testing: first, people who go to primary medical and health institutions and have symptoms such as respiratory tract and fever within 5 days; Second, isolated observers, including those in home isolation observation, close contact and sub-close contact, entry isolation observation, closed control area and control area; Third, community residents who have the need for antigen self-testing.
Li Jinming, Deputy Director of Clinical Laboratory Center of National Health and Wellness Commission:Although antigen detection is not as sensitive as nucleic acid, it can be detected by most patients when the virus concentration is relatively high.
Experts say that antigen detection is fast and convenient. The sooner an infected person is found, the less the virus will spread, and the faster we can take prevention and control measures, and finally we can achieve "dynamic zero clearing" at a faster speed.
Yesterday, National Medical Products Administration approved the registration applications of five COVID-19 antigen products. Since then, a total of 10 COVID-19 antigen self-test products have been officially listed. The self-test of antigen needs to read the instructions carefully, and carry out sampling, sample addition and result interpretation in accordance with the specified requirements and procedures.
Li Jinming, Deputy Director of Clinical Laboratory Center of National Health and Wellness Commission:Self-test is generally to take nasal swab, and the general temperature is room temperature. Let’s do the test below, not too cold or too hot.
Persons with positive antigen self-test, regardless of whether they have symptoms such as respiratory tract and fever, should immediately report to their communities (villages and towns), and the communities (villages and towns) should contact the emergency center to transport residents to medical institutions with fever clinics for nucleic acid detection in accordance with the guidelines for the transport of personnel related to the COVID-19 epidemic. At the same time, the sampling swabs, sampling tubes and test cards used by positive personnel are put into sealed bags and transported to medical institutions for medical waste disposal.
People with negative antigen self-test but symptoms are advised to go to a medical institution with fever clinic as soon as possible for nucleic acid detection; If it is inconvenient to see a doctor, you should isolate yourself at home, avoid going out for activities, and conduct antigen self-test once a day for 5 consecutive days.
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