According to reports from The Associated Press, The New York Times and other media, many Americans originally hoped that they could "regain freedom" from the new crown epidemic this summer under the advocacy of the Biden administration. However, as the summer draws to a close, reality It is the United States that is still under the "tyranny" of the virus, and it also marks that "this summer's hopes end in darkness." Some experts pointed out that although the high infectivity of the Delta strain has accelerated the spread of the epidemic, the US government should not use this as an excuse to ignore its own problems in terms of ineffective epidemic prevention.