At present, the cumulative number of confirmed cases of new coronary pneumonia in the United States has exceeded 42.38 million, and the cumulative number of deaths has exceeded 678,000. This figure also exceeds the 1918 pandemic that caused 675,000 deaths in the United States. Some American experts commented that the scientific level of epidemic prevention has made great progress in the past 100 years, but there are still so many deaths in the United States. The development of the epidemic in the United States to such a serious level is inseparable from human factors.