Near Christmas, a traditional western holiday, compared with the white lie of "Santa Claus", tens of millions of Americans now believe that vaccines are not trustworthy. According to the latest poll released by Caesar Family Foundation on December 15th, more than half of the people have no positive attitude towards vaccination. In the face of new things, it is understandable to be hesitant; However, it is also a fact that the leaders of the US federal government have not done their homework in eliminating public concerns. What's more, some government officials talk about "scientific truth", but their behavior is destroying the order of epidemic prevention, which makes people's distrust worse. The safety of vaccines is a "scientific problem". However, in the United States, where the public lacks trust in the government, perhaps as The New York Times said, people can no longer just "believe in science", and "the debate about vaccines is inevitably given political significance".