"The travel ban with China has had an impact," Dr. Tom Frieden, former director of the US Centers for Disease Control and Prevention (CDC) and current director of the Global Health Initiative "Resolve To Save Lives" (Resolve To Save Lives) At the end of March, he told the editors and reporters of USA Today, "It caused a significant delay in the number of infections, and because of this, it has earned the United States better preparation time." However, this time has not been optimally used.
Former Director of the Centers for Disease Control and Prevention: China’s travel ban has worked, but the United States is not prepared enough for the coronavirus."https://www.usatoday.com/story/travel/2020/07/17/cdc-europe-travel-ban-came-too-late-prevent-new-york-outbreak/5459172002/