Dr. Anthony Fauci discusses COVID-19 origins and lessons learned 3 years later

Dr. Anthony Fauci, former director of the National Institute of Allergy and Infectious Diseases, joins CBS News’ John Dickerson to reflect on three years since the coronavirus pandemic began. He admits we may never know with certainty the origins of COVID-19, and called the scientific response to the virus one of the greatest successes he’s seen.