Dr. Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases, said the country is in a "very critical time right now" as it pulls back from coronavirus mitigation.

"When we do start to see cases come back and I'll guarantee you they will — as we pull back from mitigation, we'll be seeing cases. If we have in place the capability to identify by testing, isolate, contact trace, get people out of circulation who are infected, that's called containment. If we are capable of doing that, effectively, then we should feel some good confidence that we can slowly move on," Fauci said during a Time 100 Talk today.