Genomics research shows that the human genome contains 20,000 to 25,000 genes, but so far, using gene detection technology, only more than a thousand disease genes can be found, and all are single-gene diseases. Multi-gene diseases that humans still suffer from It is a blind spot for technical testing. In this regard, the results of existing genetic tests all use "high", "medium", "low" or a percentage range to indicate the individual's risk probability of a certain disease, which 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 author intends to explain through this text (>. ['Human illness is a very complex process.', 'Existing genetic test results are not refined enough.', 'Current genetic testing has its technical limitations.', 'Genetic test results cannot exclude the possibility of human disease.']