The Delta variant of the novel coronavirus that was first found in India is the greatest threat to the United States' effort to eradicate COVID-19 within its borders, said U.S. infectious disease expert Dr. Anthony Fauci during a Tuesday press call. #News #Reuters #Fauci #DeltaVariant #COVID Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en