이상 5.5 미국의 백만 명이 새로운 코로나 바이러스에 감염되었습니다., 그리고 많은 연구 기관이 다른 탐지 방법을 연속적으로 개발했습니다.. The Yale School of Public Health has developed a new saliva testing method that not only has results within a few hours, but also costs only about ten dollars each time. 미국. Food and Drug Administration has issued an emergency authorization permit, which is the fifth saliva test approved.
The US media reported that this type of saliva test is quick and cheap because it omits the step of isolating the ribonucleic acid (RNA) from the virus. It only needs to add reagents to the sample and release the virus genome through a short heating process.