A top infectious disease expert in the Trump administration told Congress on Thursday the U.S. healthcare system is failing to test any person who needs it quickly as the COVID-19 virus spreads across the country.

Anthony Fauci, the head of the National Institute of Allergy and Infectious Diseases and a leader on the White House Coronavirus Task Force, told the House Oversight Committee on Thursday the United States is not as well prepared for mass testing as other countries.