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Written by: Yuan Shu
2021-01-21 16:29
Last update date: 2021-01-21 16:30
The fourth wave of the new crown pneumonia epidemic broke out in Hong Kong. The government promoted community testing and compulsory testing to find confirmed cases. However, some confirmed patients had been tested at community testing centers and mobile sampling vehicles earlier, and the results were negative, questioning the accuracy of the testing .
Hong Kong biotechnology startup Xiangda Biotechnology launched a "dual-track test" in multiple communities in December last year, that is, the testees are sampled for rapid testing and nucleic acid testing at the same time. Among more than 9,200 test results, the rapid test accuracy Up to 93.33 to 99.95%.
Zhao Yantao, the founder of Xiangda Biotechnology, pointed out that within two hours, a positive case was found in the Regent Garden, so that the Department of Health could immediately arrange the patient to be isolated.
He pointed out that the relevant technology has been used in hospitals, Yada supermarkets and other places, and hopes to be applied in other places or activities.
Zhao Yantao, the founder of Xiangda Biotechnology, pointed out that a positive case was found in Regent Garden within two hours, so that the Department of Health can immediately arrange for patient isolation.
(Photo by Lu Yiming)
Zhao Yantao pointed out that since December, 9,236 community dual-track tests have been completed, including in communities where the outbreak occurred in Lijing Garden, Yiming Village, and Dongtou Village.
During the dual-track test, a total of 19 positive samples were found, and 14 were finally confirmed after the nucleic acid test.
The test results also showed that the accuracy of the positive test of the rapid antigen test compared to the nucleic acid test was 93.33%, and the accuracy of the negative test was as high as 99.95%.
Zhao said that the rapid antigen test takes only 20 minutes to get results, while the traditional nucleic acid test takes 1 to 2 days. In addition, the accuracy of more than 90% is also the advantage of rapid test. It is suitable for communities at risk of outbreaks. High-risk groups are tested.
He said that in the dual-track test, citizens only need to take an additional nasal cavity sample at the same time as the nucleic acid test, and the result will be available within 20 minutes. If the result is positive, the sample will be tested for antigen again, and if it is positive again, it will pass. The rapid nucleic acid test confirms that the Department of Health can be notified as soon as 60 minutes.
He believes that by adding the rapid nucleic acid test as the final confirmation, false positive and false negative results can be avoided.
The quick test of Sangda Biotechnology can produce results in as fast as 20 minutes.
(Photo by Lu Yiming)
Zhao Yantao continued that when the company provided rapid antigen testing at Regent Gardens, it had found the first case with a high positive virus index in the first two hours and announced it at a press conference of the Department of Health on the same day, so that the Department of Health can immediately arrange patient isolation. Avoid spread by patients while waiting for nucleic acid test results.
In addition, when the epidemic broke out in Dongtou Village, the company also determined that 50 residents' samples were negative through rapid antigen testing, and helped Yuan Guoyong, a visiting professor of the Department of Microbiology of the University of Hong Kong, finally decided that some residents did not need to evacuate.
In addition, in the test in Sham Shui Po yesterday, 4 positive cases were also found through the rapid antigen test.
Zhao said, "Rapid antigen testing can serve as a firefighter."
There was an outbreak in the Regent Garden earlier, and residents lined up for testing.
(Photo by Liang Pengwei/Picture of Profile)
Zhao Yantao said that in addition to assisting community testing, he hopes that rapid antigen testing can be applied to large-scale events and venues.
For example, on the day before a large-scale event, citizens can be arranged to take a test at home before attending the event with a negative result.
However, he pointed out that the accuracy of the antigen test is always lower than that of the nucleic acid test and cannot be completely replaced.
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▼1.21 Residents in designated areas of Sham Shui Po go to the testing station for virus testing▼
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