More than 5.5 million people in the United States are infected with the new coronavirus, and several research institutions have developed different testing methods. The Yale School of Public Health has developed a saliva test that not only provides results in a few hours, but also costs only about $10 per test. The U.S. Food and Drug Administration has granted an emergency authorization permit, and is the fifth saliva test to be approved.
The U.S. media reported that this saliva test is fast and inexpensive because it omits the step of isolating the ribonucleic acid (RNA) in the virus and only requires the addition of reagents to the sample and the release of the viral genome through a short heating procedure.
In the general way of collecting nasal mucosa samples, health care workers have to stick swabs into people's nostrils or throats at close range, which poses a higher risk of infection, but now people only need to spit into the test container to complete the process of collecting samples. Since swabs and other testing supplies were in short supply during the outbreak, and laboratories did not need to use special kits to extract nucleic acids, the cost of this saliva test could be reduced to about $10.
Yale University worked with the NBA in June to do daily saliva and nasopharyngeal swab tests for players, coaches and staff at the same time, and the final results were nearly identical, so this season's NBA regular season was completed successfully, thanks in part to this saliva test.
Check the box first when you get it, and do not use it if you find it open or broken. The head of the sampling swab should never come into contact with other objects such as cheeks, fingers, teeth, etc. If the swab head falls off during the sampling process, please replace it with a new swab.
30 minutes before sampling, please do not eat, drink, smoke, etc., to keep the mouth free from other molecules. Now prepare for sampling, first of all, rinse your mouth with water 2-3 times to ensure that your mouth is clean and free of foreign substances. We first open the box, then take out the oral swab, reach into the oral cavity, the swab's cotton swab head lightly press the inner cheek of the oral cavity (the inner cheek), the strength so that the cheek is slightly convex, an up and down for 1 time, scraping 20 times. After the scraping, the swab tip was quickly inserted into the sample collection tube, and then the finger pushed the back lever of the swab to drive the swab tip into the tube.
Subsequently, immediately screw the cap of the tube and shake it up and down 5 times to make the sample fully mixed with the preservation solution. After completing the above collection steps, the barcode was attached to the sample tube in vertical shape. Then the mouth was sealed.
