Genomics research shows that the human genome contains 20 to 25000 genes, but so far, using gene detection technology, only more than a thousand disease genes can be found, and all of them are single gene diseases. However, polygenic diseases in humans are still a blind spot for technical testing. In this regard, the existing genetic test results all use high, medium, low or a certain percentage range to indicate the risk probability of an individual suffering from a certain disease, which simply cannot reach the so-called 100% accuracy. In addition, even if the genetic test results are normal, the possibility of getting sick cannot be ruled out.
 The main content of this text is that the current gene detection has its limitations in the application of technology.