Since the beginning of the US epidemic, several state governments have complained that the detection of the new coronavirus is not enough, which has caused the epidemic to spread rapidly. On the 18th, a number of US media such as the Washington Post and CNN reported that it was actually due to contamination in the laboratory of the US Centers for Disease Control and Prevention (CDC). Working hind legs. ” According to US media reports, in late January, the US Centers for Disease Control sent the first batch of new coronavirus test kits to 26 public health laboratories across the country. However, before analyzing the samples collected from patients, 24 of the 26 laboratories using this batch of test kits actually had a “false positive” reaction, which aroused the concern of this batch of kits from all walks of life. What is a false positive reaction? In general, a positive (+) signifies that the disease or physiological changes in the body have a certain result. On the contrary, most of the negative (-) on the test or report form basically negate or exclude the possibility of a certain disease. However, due to environmental factors, operational factors, experimental methods, or patient’s own factors, etc., people who do not have positive symptoms may be tested positive. Why is there a false positive? The US media revealed that illegal operations during the assembly of the CDC laboratory resulted in contamination. As early as late January, 24 of the 26 laboratories in the United States that received the kits became unusable. Violation of the operation when assembling the kit leads to contamination. This means that regardless of whether the subject is infected or not, the test result is positive, which means that the infection is determined. How did CDC “direct” the pandemic? After detecting the first confirmed case in the United States, the CDC sent kits to 26 public health laboratories across the United States at the end of January, but it was unusable. Informed sources said that before analyzing patient samples, the kits in 24 laboratories had false positive reactions. Test samples from various locations were forced to be sent back to Atlanta laboratories for secondary verification, which led to severe stagnation of testing in multiple states. The Washington Post published an article on Saturday, citing interviews by more than 30 current (former) CDC officials and insiders, revealing that the institution ’s laboratory violated regulations while assembling kits, detecting cross-infection of components and viruses, Not available. On Friday, the US Food and Drug Administration (FDA) pointed out in a statement that the design of the kit was no problem and that “the CDC did not follow its own operating specifications when assembling the kit.” It was not until March 9 that the real kit began to be widely used. For more than a month, there was no effective detection method, which led to its widespread community popularity.