FAM channel, VIC channel, etc. are the fluorescent channels used in nucleic acid detection technology. The FAM channel, VIC channel, etc. implement multiplex PCR detection technology in which TaqMan fluorescent probes are connected to the corresponding excitation fluorescent groups FAM and VIC. Fluorescent quantitative RT-PCR technology was launched by Applied Biosystems in the United States in 1996. The technology has developed from a single dye staining method to a probe method with higher specificity, from being able to detect only a single wavelength to being able to detect multiple wavelengths of light sources. It is widely used. Multiplex PCR technology.
Nucleic acid testing:
The substance used in nucleic acid testing is the nucleic acid of the virus. Nucleic acid testing is to search for the presence of nucleic acid of foreign invading viruses in the patient's respiratory specimens, blood or stool to determine whether he or she is infected by the new coronavirus. Therefore, once the nucleic acid test is "positive", it can prove that the virus is present in the patient's body. After the new coronavirus infects the human body, it will first reproduce in the respiratory system. Therefore, it can be determined whether the human body is infected with the virus by detecting the viral nucleic acid in sputum and nasopharyngeal swabs.