Though COVID-19 caseloads, deaths and hospitalizations are declining in the U.S., the nation’s top infectious disease expert is urging Americans to get vaccinated and boosted as a new variant emerges across Europe. WTOP’s Digital Editor Scott Gelman talked to President Joe Biden’s chief medical adviser, Dr. Anthony Fauci, about the rise in COVID-19 cases, why it’s happening and what to do about it. This episode features Scott’s entire conversation with Dr. Fauci.