US President Donald Trump listens as Director of the National Institute of Allergy and Infectious Diseases Anthony Fauci speaks during the daily briefing on the novel coronavirus, COVID-19, at the White House on March 24, 2020, in Washington, DC.

Americans need to prepare for a second cycle of the COVID-19 outbreak in the United States, a White House health advisor said Wednesday.

"Would this possibly become a seasonal cyclic thing? I've always indicated to you that I think it very well might," Dr. Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases, said a White House press briefing.